SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	56,562
15	GENERAL BUILDING CONTRACTORS	8,235	69
16	HEAVY CONSTRUCTION CONTRACTORS	18,336	75
17	SPECIAL TRADE CONTRACTORS	86,323	141
20	FOOD AND KINDRED PRODUCTS	12,290	65
21	TOBACCO MANUFACTURERS	43
22	TEXTILE MILL PRODUCTS	15,746	5,080
23	APPAREL AND OTHER TEXTILE PRODUCTS	932	134
24	LUMBER AND WOOD PRODUCTS	6,669	7
25	FURNITURE AND FIXTURES	632
26	PAPER AND ALLIED PRODUCTS	19,422	181
27	PRINTING AND PUBLISHING	14,126	3,359
28	CHEMICALS AND ALLIED PRODUCTS	23,977	412
29	PETROLEUM AND COAL PRODUCTS	10,093
30	RUBBER AND MISC. PLASTICS PRODUCTS	7,515	585
32	STONE, CLAY, AND GLASS PRODUCTS	31,432	3,206
33	PRIMARY METAL INDUSTRIES	51,838	777
34	FABRICATED METAL PRODUCTS	34,842	260
35	MACHINERY, EXCEPT ELECTRICAL	83,478	7,143
36	ELECTRIC AND ELECTRONIC EQUIPMENT	18,893	2,620
37	TRANSPORTATION EQUIPMENT	41,406	2,081
38	INSTRUMENTS AND RELATED PRODUCTS	6,884	2,325
39	MISCELLANEOUS MANUFACTURING INDUSTRIES	1,426	739
40	RAILROAD TRANSPORTATION	501
41	LOCAL AND INTERURBAN PASSENGER TRANSIT	4,624
42	TRUCKING AND WAREHOUSING	8,909	62
44	WATER TRANSPORTATION	13,211	332
45	TRANSPORTATION BY AIR	21,795	293
48	COMMUNICATION	9,089	613
49	ELECTRIC, GAS, AND SANITARY SERVICES	31,943	172
50	WHOLESALE TRADE - DURABLE GOODS	7,952
51	WHOLESALE TRADE - NONDURABLE GOODS	1,505
55	AUTOMOTIVE DEALERS & SERVICE STATIONS	14,118
72	PERSONAL SERVICES	757
73	BUSINESS SERVICES	6,088	1,505
75	AUTO REPAIR, SERVICES, AND GARAGES	34,624
76	MISCELLANEOUS REPAIR SERVICES	2,684
80	HEALTH SERVICES	7,217	820
84	MUSEUMS, BOTANICAL, ZOOLOGICAL GARDENS	1,643	164
TOTAL		718,150	33,221

*(1) By survey design, not all 2-digit SICs were surveyed. (2) The estimates for each 2-digit SIC apply only to the 3- and 4-digit SICs surveyed within the 2-digit SIC. Not all SICs were surveyed. (3) When using the estimates, standard errors associated with estimates should be considered. (4) Potential exposures to a chemical agent are categorized as actual (i.e., the surveyor observed the use of the specific agent) or tradename (i.e., the surveyor observed the use of a tradename product known to contain the specific agent). The estimates presented in the table combine both categories.