SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	3,053
15	GENERAL BUILDING CONTRACTORS	20,275	776
16	HEAVY CONSTRUCTION CONTRACTORS	6,763	100
17	SPECIAL TRADE CONTRACTORS	27,547
20	FOOD AND KINDRED PRODUCTS	3,789	229
21	TOBACCO MANUFACTURERS	2
22	TEXTILE MILL PRODUCTS	1,989
24	LUMBER AND WOOD PRODUCTS	555
26	PAPER AND ALLIED PRODUCTS	1,284
27	PRINTING AND PUBLISHING	61
28	CHEMICALS AND ALLIED PRODUCTS	5,640	539
29	PETROLEUM AND COAL PRODUCTS	1,531	806
30	RUBBER AND MISC. PLASTICS PRODUCTS	1,702
32	STONE, CLAY, AND GLASS PRODUCTS	1,675
33	PRIMARY METAL INDUSTRIES	12,523	30
34	FABRICATED METAL PRODUCTS	18,276	35
35	MACHINERY, EXCEPT ELECTRICAL	22,899	39
36	ELECTRIC AND ELECTRONIC EQUIPMENT	3,737	812
37	TRANSPORTATION EQUIPMENT	12,586	946
38	INSTRUMENTS AND RELATED PRODUCTS	1,663	312
39	MISCELLANEOUS MANUFACTURING INDUSTRIES	1,171
40	RAILROAD TRANSPORTATION	632
42	TRUCKING AND WAREHOUSING	195	170
45	TRANSPORTATION BY AIR	3,161	2,888
46	PIPE LINES, EXCEPT NATURAL GAS	8,085
48	COMMUNICATION	6,288	5,791
49	ELECTRIC, GAS, AND SANITARY SERVICES	3,985	116
50	WHOLESALE TRADE - DURABLE GOODS	10,301	247
51	WHOLESALE TRADE - NONDURABLE GOODS	1,359
73	BUSINESS SERVICES	1,360	862
75	AUTO REPAIR, SERVICES, AND GARAGES	5,428
76	MISCELLANEOUS REPAIR SERVICES	13,078
80	HEALTH SERVICES	1,988	1,876
TOTAL		204,603	16,574

*(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.