Union Membership, Coverage, Density and Employment by Industry, 2006 (details in table note)
CIC	Industry Name (SIC codes in parentheses)	Obs	Employment	Members	Covered	%Mem	%Cov
	AGRICULTURE, FORESTRY, FISHING, & HUNTING	1,748	1,111,961	32,773	35,892	2.9	3.2
170	Crop production	630	444,509	11,358	13,056	2.6	2.9
180	Animal production	698	410,567	7,288	7,288	1.8	1.8
190	Forestry except logging	105	52,625	3,879	4,408	7.4	8.4
270	Logging	122	70,480	4,169	4,169	5.9	5.9
280	Fishing, hunting, and trapping	44	20,302	0	0	0.0	0.0
290	Support activities for agriculture and forestry	149	113,477	6,079	6,970	5.4	6.1
	MINING	1,213	633,712	47,654	55,757	7.5	8.8
370	Oil and gas extraction	150	93,765	1,054	2,122	1.1	2.3
380	Coal mining	268	97,720	21,519	22,555	22.0	23.1
390	Metal ore mining	75	29,988	5,671	7,865	18.9	26.2
470	Nonmetallic mineral mining and quarrying	194	102,527	15,868	17,180	15.5	16.8
480	Not specified type of mining	6	3,202	0	0	0.0	0.0
490	Support activities for mining	520	306,510	3,542	6,036	1.2	2.0
	UTILITIES	1,692	1,181,841	362,264	376,980	30.7	31.9
570	Electric power generation, transmission and distribution	912	627,060	189,750	198,685	30.3	31.7
580	Natural gas distribution	196	132,755	33,131	33,312	25.0	25.1
590	Electric and gas, and other combinations	95	71,785	31,161	31,161	43.4	43.4
670	Water, steam, air-conditioning, and irrigation systems	311	222,642	63,556	69,051	28.5	31.0
680	Sewage treatment facilities	158	110,097	37,694	37,798	34.2	34.3
690	Not specified utilities	20	17,502	6,973	6,973	39.8	39.8
770	CONSTRUCTION	12,066	8,877,176	1,246,521	1,307,364	14.0	14.7
	NONDURABLE GOODS MANUFACTURING	7,574	5,590,213	641,532	690,363	11.5	12.3
1070	Animal food, grain and oilseed milling	211	131,303	25,226	25,226	19.2	19.2
1080	Sugar and confectionery products	107	77,041	18,422	18,801	23.9	24.4
1090	Fruit and vegetable preserving and specialty food manufacturing	222	151,053	29,464	31,275	19.5	20.7
1170	Dairy product manufacturing	232	141,304	24,631	26,256	17.4	18.6
1180	Animal slaughtering and processing	739	465,921	87,484	94,894	18.8	20.4
1190	Retail bakeries	174	126,688	12,553	13,486	9.9	10.6
1270	Bakeries, except retail	217	163,397	34,906	36,049	21.4	22.1
1280	Seafood and other miscellaneous foods, n.e.c.	258	185,081	21,776	21,776	11.8	11.8
1290	Not specified food industries	25	17,822	1,959	3,454	11.0	19.4
1370	Beverage manufacturing	261	198,919	23,506	28,926	11.8	14.5
1390	Tobacco manufacturing	35	32,228	6,825	9,631	21.2	29.9
1470	Fiber, yarn, and thread mills	32	26,390	0	0	0.0	0.0
1480	Fabric mills, except knitting	148	114,103	3,755	3,755	3.3	3.3
1490	Textile and fabric finishing and coating mills	52	38,365	1,340	1,340	3.5	3.5
1570	Carpet and rug mills	75	70,681	980	980	1.4	1.4
1590	Textile product mills, except carpets and rugs	137	105,953	3,172	4,222	3.0	4.0
1670	Knitting mills	30	22,879	0	0	0.0	0.0
1680	Cut and sew apparel manufacturing	334	300,628	12,623	15,781	4.2	5.2
1690	Apparel accessories and other apparel manufacturing	15	12,558	0	0	0.0	0.0
1770	Footwear manufacturing	68	39,563	3,937	3,937	10.0	10.0
1790	Leather tanning and products, except footwear manufacturing	42	33,850	1,132	1,132	3.3	3.3
1870	Pulp, paper, and paperboard mills	292	199,132	63,934	66,160	32.1	33.2
1880	Paperboard containers and boxes	204	160,546	31,113	31,585	19.4	19.7
1890	Miscellaneous paper and pulp products	130	95,777	12,857	12,857	13.4	13.4
1990	Printing and related support activities	886	652,430	38,934	39,930	6.0	6.1
2070	Petroleum refining	162	133,432	26,852	31,372	20.1	23.5
2090	Miscellaneous petroleum and coal products	25	18,504	4,051	4,051	21.9	21.9
2170	Resin, synthetic rubber and fibers, and filaments manufacturing	157	120,864	7,383	8,377	6.1	6.9
2180	Agricultural chemical manufacturing	43	28,115	2,286	2,286	8.1	8.1
2190	Pharmaceutical and medicine manufacturing	531	406,645	16,891	19,837	4.2	4.9
2270	Paint, coating, and adhesive manufacturing	87	70,943	5,003	5,003	7.1	7.1
2280	Soap, cleaning compound, and cosmetics manufacturing	170	131,138	5,448	7,929	4.2	6.0
2290	Industrial and miscellaneous chemicals	563	417,374	43,744	45,849	10.5	11.0
2370	Plastics product manufacturing	678	521,145	37,220	41,075	7.1	7.9
2380	Tire manufacturing	120	101,658	28,793	29,800	28.3	29.3
2390	Rubber products, except tires, manufacturing	112	76,783	3,330	3,330	4.3	4.3
	DURABLE GOODS MANUFACTURING	13,496	10,134,924	1,208,906	1,285,347	11.9	12.7
2470	Pottery, ceramics, and related products manufacturing	29	19,480	1,313	1,313	6.7	6.7
2480	Structural clay product manufacturing	42	32,032	2,451	2,451	7.7	7.7
2490	Glass and glass product manufacturing	169	142,424	29,666	30,906	20.8	21.7
2570	Cement, concrete, lime, and gypsum product manufacturing	290	211,084	29,105	29,105	13.8	13.8
2590	Miscellaneous nonmetallic mineral product manufacturing	116	82,256	9,054	9,054	11.0	11.0
2670	Iron and steel mills and steel product manufacturing	331	276,623	70,545	72,911	25.5	26.4
2680	Aluminum production and processing	82	71,619	19,656	19,656	27.4	27.4
2690	Nonferrous metal, except aluminum, production and processing	65	48,987	8,436	8,436	17.2	17.2
2770	Foundries	133	104,871	21,614	23,926	20.6	22.8
2780	Metal forgings and stampings	109	86,012	9,471	10,373	11.0	12.1
2790	Cutlery and hand tool manufacturing	69	50,169	4,239	4,239	8.4	8.4
2870	Structural metals, and tank and shipping container manufacturing	562	387,759	54,327	56,239	14.0	14.5
2880	Machine shops; turned product; screw, nut and bolt manufacturing	440	334,596	25,446	25,820	7.6	7.7
2890	Coating, engraving, heat treating and allied activities	133	90,583	3,909	3,909	4.3	4.3
2970	Ordnance	80	41,445	5,158	5,336	12.4	12.9
2980	Miscellaneous fabricated metal products manufacturing	381	282,006	31,764	32,263	11.3	11.4
2990	Not specified metal industries	14	9,896	498	1,404	5.0	14.2
3070	Agricultural implement manufacturing	159	89,900	9,351	10,320	10.4	11.5
3080	Construction, mining and oil field machinery manufacturing	185	126,540	9,310	10,838	7.4	8.6
3090	Commercial and service industry machinery manufacturing	156	106,609	6,041	6,041	5.7	5.7
3170	Metalworking machinery manufacturing	211	156,987	12,531	12,531	8.0	8.0
3180	Engines, turbines, and power transmission equipment manufacturing	101	78,874	13,312	13,983	16.9	17.7
3190	Machinery manufacturing, n.e.c.	921	690,028	56,976	62,670	8.3	9.1
3290	Not specified machinery manufacturing	9	3,858	676	676	17.5	17.5
3360	Computer and peripheral equipment manufacturing	419	341,468	1,686	4,188	0.5	1.2
3370	Communications, audio, and video equipment manufacturing	220	174,822	3,729	6,571	2.1	3.8
3380	Navigational, measuring, electromedical, & control instruments manufacturin	372	240,456	17,685	20,588	7.4	8.6
3390	Electronic component and product manufacturing, n.e.c.	1,002	739,018	19,937	23,115	2.7	3.1
3470	Household appliance manufacturing	120	95,388	22,351	23,076	23.4	24.2
3490	Electrical lighting, equipment, and supplies manufacturing, n.e.c.	583	440,866	33,912	36,418	7.7	8.3
3570	Motor vehicles and motor vehicle equipment manufacturing	1,570	1,377,527	358,121	369,612	26.0	26.8
3580	Aircraft and parts manufacturing	537	363,839	76,099	85,998	20.9	23.6
3590	Aerospace products and parts manufacturing	336	263,820	42,310	45,197	16.0	17.1
3670	Railroad rolling stock manufacturing	35	26,448	8,800	8,800	33.3	33.3
3680	Ship and boat building	252	160,415	33,050	39,588	20.6	24.7
3690	Other transportation equipment manufacturing	63	45,958	6,773	6,773	14.7	14.7
3770	Sawmills and wood preservation	189	125,743	14,727	17,692	11.7	14.1
3780	Veneer, plywood, and engineered wood products	105	66,382	6,562	7,700	9.9	11.6
3790	Prefabricated wood buildings and mobile homes	90	68,317	1,831	2,551	2.7	3.7
3870	Miscellaneous wood products	362	244,657	14,482	14,482	5.9	5.9
3890	Furniture and related product manufacturing	823	657,346	32,882	36,334	5.0	5.5
3960	Medical equipment and supplies manufacturing	698	503,966	12,314	12,937	2.4	2.6
3970	Toys, amusement, and sporting goods manufacturing	176	117,825	5,837	7,001	5.0	5.9
3980	Miscellaneous manufacturing, n.e.c.	550	366,339	34,312	34,463	9.4	9.4
3990	Not specified manufacturing industries	207	189,685	26,661	27,865	14.1	14.7
	WHOLESALE TRADE	5,608	4,111,639	202,079	215,643	4.9	5.2
4070	Motor vehicles, parts and supplies, merchant wholesalers	297	229,610	8,465	8,465	3.7	3.7
4080	Furniture and home furnishing, merchant wholesalers	105	78,489	2,588	2,588	3.3	3.3
4090	Lumber and other construction materials, merchant wholesalers	299	210,117	7,887	8,386	3.8	4.0
4170	Professional and commercial equipment and supplies, merchant wholesalers	553	407,440	9,117	10,984	2.2	2.7
4180	Metals and minerals, except petroleum, merchant wholesalers	103	77,632	3,343	3,343	4.3	4.3
4190	Electrical goods, merchant wholesalers	388	309,839	10,468	11,427	3.4	3.7
4260	Hardware, plumbing and heating equipment, and supplies, merchant wholesaler	256	178,738	7,456	7,456	4.2	4.2
4270	Machinery, equipment, and supplies, merchant wholesalers	720	517,954	17,242	17,343	3.3	3.3
4280	Recyclable material, merchant wholesalers	126	97,582	2,319	5,984	2.4	6.1
4290	Miscellaneous durable goods, merchant wholesalers	161	125,843	663	663	0.5	0.5
4370	Paper and paper products, merchant wholesalers	119	81,128	2,062	2,957	2.5	3.6
4380	Drugs, sundries, and chemical and allied products, merchant  wholesalers	334	265,096	8,869	9,653	3.3	3.6
4390	Apparel, fabrics, and notions, merchant wholesalers	117	95,532	5,698	5,698	6.0	6.0
4470	Groceries and related products, merchant wholesalers	1,086	785,812	88,453	93,101	11.3	11.8
4480	Farm product raw materials, merchant wholesalers	94	48,337	1,939	1,939	4.0	4.0
4490	Petroleum and petroleum products, merchant wholesalers	188	122,573	2,980	2,980	2.4	2.4
4560	Alcoholic beverages, merchant wholesalers	196	142,008	12,923	13,069	9.1	9.2
4570	Farm supplies, merchant wholesalers	95	58,226	436	436	0.7	0.7
4580	Miscellaneous  nondurable goods, merchant wholesalers	243	185,453	6,901	6,901	3.7	3.7
4585	Wholesale electronic markets, agents and brokers	88	65,881	1,841	1,841	2.8	2.8
4590	Not specified wholesale trade	40	28,349	428	428	1.5	1.5
	RETAIL TRADE	21,033	15,237,791	765,466	823,219	5.0	5.4
4670	Automobile dealers	1,861	1,360,788	44,119	45,241	3.2	3.3
4680	Other motor vehicle dealers	227	162,338	1,882	1,882	1.2	1.2
4690	Auto parts, accessories, and tire stores	623	466,732	12,134	12,534	2.6	2.7
4770	Furniture and home furnishings stores	775	609,307	9,817	10,839	1.6	1.8
4780	Household appliance stores	97	64,829	1,464	2,021	2.3	3.1
4790	Radio, TV, and computer stores	729	552,228	2,328	5,105	0.4	0.9
4870	Building material and supplies dealers	1,454	1,046,657	22,255	25,548	2.1	2.4
4880	Hardware stores	289	190,513	2,422	2,422	1.3	1.3
4890	Lawn and garden equipment and supplies stores	349	224,515	2,107	2,107	0.9	0.9
4970	Grocery stores	3,565	2,506,342	479,589	504,895	19.1	20.1
4980	Specialty food stores	252	181,647	8,428	8,428	4.6	4.6
4990	Beer, wine, and liquor stores	150	105,140	5,495	6,879	5.2	6.5
5070	Pharmacies and drug stores	1,071	790,417	36,709	40,843	4.6	5.2
5080	Health and personal care, except drug, stores	306	233,675	2,661	3,918	1.1	1.7
5090	Gasoline stations	721	491,104	11,552	11,552	2.4	2.4
5170	Clothing and accessories, except shoe, stores	1,132	837,678	7,163	9,031	0.9	1.1
5180	Shoe stores	184	141,694	3,112	3,112	2.2	2.2
5190	Jewelry, luggage, and leather goods stores	228	160,480	1,523	1,523	0.9	0.9
5270	Sporting goods, camera, and hobby and toy stores	588	385,496	1,764	2,432	0.5	0.6
5280	Sewing, needlework, and piece goods stores	74	48,129	1,080	1,080	2.2	2.2
5290	Music stores	125	94,302	680	680	0.7	0.7
5370	Book stores and news dealers	229	174,189	2,548	2,548	1.5	1.5
5380	Department stores and discount stores	3,265	2,439,663	64,912	71,504	2.7	2.9
5390	Miscellaneous general merchandise stores	586	429,070	13,014	17,616	3.0	4.1
5470	Retail florists	189	131,118	0	902	0.0	0.7
5480	Office supplies and stationery stores	215	162,359	2,080	3,293	1.3	2.0
5490	Used merchandise stores	181	135,092	0	0	0.0	0.0
5570	Gift, novelty, and souvenir shops	260	176,285	3,585	3,585	2.0	2.0
5580	Miscellaneous retail stores	423	316,126	5,426	5,426	1.7	1.7
5590	Electronic shopping	70	57,512	0	0	0.0	0.0
5591	Electronic auctions	14	8,357	0	0	0.0	0.0
5592	Mail order houses	157	92,035	1,784	2,304	1.9	2.5
5670	Vending machine operators	75	60,812	3,993	3,993	6.6	6.6
5680	Fuel dealers	151	79,819	4,108	4,239	5.1	5.3
5690	Other direct selling establishments	159	109,216	2,920	2,920	2.7	2.7
5790	Not specified retail trade	259	212,126	2,814	2,814	1.3	1.3
	TRANSPORTATION & WAREHOUSING	7,644	5,633,516	1,718,571	1,831,033	30.5	32.5
6070	Air transportation	757	530,162	261,260	273,695	49.3	51.6
6080	Rail transportation	418	264,809	187,622	187,725	70.9	70.9
6090	Water transportation	103	68,508	10,839	10,936	15.8	16.0
6170	Truck transportation	2,186	1,622,556	194,128	205,173	12.0	12.6
6180	Bus service and urban transit	748	562,989	221,712	227,434	39.4	40.4
6190	Taxi and limousine service	177	146,037	11,474	17,053	7.9	11.7
6270	Pipeline transportation	72	35,250	3,219	3,321	9.1	9.4
6280	Scenic and sightseeing transportation	42	19,906	917	917	4.6	4.6
6290	Services incidental to transportation	786	621,212	119,006	128,439	19.2	20.7
6370	Postal Service	1,174	807,462	511,400	562,504	63.3	69.7
6380	Couriers and messengers	785	621,282	171,216	183,428	27.6	29.5
6390	Warehousing and storage	396	333,343	25,779	30,407	7.7	9.1
	INFORMATION	4,448	3,312,247	411,173	447,397	12.4	13.5
6470	Newspaper publishers	654	440,058	50,060	53,870	11.4	12.2
6480	Publishing, except newspapers and software	398	294,958	7,933	9,016	2.7	3.1
6490	Software publishing	136	108,398	0	0	0.0	0.0
6570	Motion pictures and video industries	341	283,128	31,788	32,881	11.2	11.6
6590	Sound recording industries	20	15,948	0	0	0.0	0.0
6670	Radio and television broadcasting and cable	732	528,133	30,728	39,700	5.8	7.5
6675	Internet publishing and broadcasting	18	15,800	0	0	0.0	0.0
6680	Wired telecommunications carriers	1,125	844,611	196,939	210,955	23.3	25.0
6690	Other telecommunications services	418	341,960	48,211	50,341	14.1	14.7
6692	Internet service providers	76	62,742	0	0	0.0	0.0
6695	Data processing, hosting, and related services	139	97,086	0	0	0.0	0.0
6770	Libraries and archives	339	238,053	45,248	49,562	19.0	20.8
6780	Other information services	52	41,373	266	1,072	0.6	2.6
	FINANCE & INSURANCE	9,344	6,661,225	143,608	179,815	2.2	2.7
6870	Banking and related activities	2,768	1,947,717	30,337	41,248	1.6	2.1
6880	Savings institutions, including credit unions	462	301,413	8,651	9,989	2.9	3.3
6890	Non-depository credit and related activities	1,520	1,119,647	13,755	16,809	1.2	1.5
6970	Securities, commodities, funds, trusts, and other financial investments	1,339	1,013,865	13,508	21,987	1.3	2.2
6990	Insurance carriers and related activities	3,255	2,278,582	77,356	89,781	3.4	3.9
	REAL ESTATE & RENTAL & LEASING	3,257	2,436,484	102,265	108,925	4.2	4.5
7070	Real estate	2,600	1,962,876	74,501	81,066	3.8	4.1
7080	Automotive equipment rental and leasing	248	181,308	16,601	16,601	9.2	9.2
7170	Video tape and disk rental	133	91,405	712	712	0.8	0.8
7180	Other consumer goods rental	131	103,701	2,701	2,701	2.6	2.6
7190	Commercial, industrial, and other intangible assets rental and leasing	145	97,194	7,750	7,845	8.0	8.1
	PROF., SCIENTIFIC, TECHNICAL SERVICES	9,308	6,829,515	117,234	150,853	1.7	2.2
7270	Legal services	1,837	1,316,496	20,873	24,366	1.6	1.9
7280	Accounting, tax preparation, bookkeeping, and payroll services	874	649,084	8,240	11,322	1.3	1.7
7290	Architectural, engineering, and related services	1,777	1,290,813	38,270	45,854	3.0	3.6
7370	Specialized design services	210	166,920	319	684	0.2	0.4
7380	Computer systems design and related services	1,802	1,383,961	18,159	23,967	1.3	1.7
7390	Management, scientific, and technical consulting services	875	620,357	8,551	10,973	1.4	1.8
7460	Scientific research and development services	774	554,588	15,318	22,095	2.8	4.0
7470	Advertising and related services	527	401,844	5,352	7,215	1.3	1.8
7480	Veterinary services	327	232,662	726	726	0.3	0.3
7490	Other professional, scientific, and technical services	305	212,790	1,425	3,651	0.7	1.7
	MANAGEMENT & RELATED SERVICES	6,595	4,968,147	227,398	261,566	4.6	5.3
7570	Management of companies and enterprises	194	144,813	5,824	9,040	4.0	6.2
7580	Employment services	1,323	990,132	17,231	23,575	1.7	2.4
7590	Business support services	825	601,152	8,823	11,601	1.5	1.9
7670	Travel arrangements and reservation services	302	201,094	1,460	2,149	0.7	1.1
7680	Investigation and security services	856	676,499	47,711	53,194	7.1	7.9
7690	Services to buildings and dwellings	1,215	901,031	49,943	54,919	5.5	6.1
7770	Landscaping services	1,040	821,850	15,128	20,175	1.8	2.5
7780	Other administrative and other support services	317	246,940	12,210	13,323	4.9	5.4
7790	Waste management and remediation services	523	384,636	69,067	73,590	18.0	19.1
	EDUCATIONAL SERVICES	17,651	12,194,346	4,072,317	4,583,154	33.4	37.6
7860	Elementary and secondary schools	12,065	8,377,100	3,582,004	3,993,930	42.8	47.7
7870	Colleges and universities, including junior colleges	4,930	3,327,106	464,130	558,759	13.9	16.8
7880	Business, technical, and trade schools and training	140	106,182	8,877	8,877	8.4	8.4
7890	Other schools, instruction, and educational services	516	383,959	17,306	21,587	4.5	5.6
	HEALTH CARE & SOCIAL ASSISTANCE	22,767	16,012,150	1,440,903	1,612,071	9.0	10.1
7970	Offices of physicians	2,164	1,567,227	37,210	47,172	2.4	3.0
7980	Offices of dentists	983	700,755	8,106	11,097	1.2	1.6
7990	Offices of chiropractors	138	98,328	1,351	1,351	1.4	1.4
8070	Offices of optometrists	117	86,362	1,854	1,854	2.1	2.1
8080	Offices of other health practitioners	226	158,762	5,000	5,000	3.1	3.1
8090	Outpatient care centers	1,281	886,089	72,041	85,119	8.1	9.6
8170	Home health care services	1,104	831,931	65,794	70,238	7.9	8.4
8180	Other health care services	1,485	1,048,572	86,925	99,882	8.3	9.5
8190	Hospitals	8,136	5,727,675	778,837	877,970	13.6	15.3
8270	Nursing care facilities	2,610	1,769,610	147,975	155,567	8.4	8.8
8290	Residential care facilities, without nursing	1,013	668,070