SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	8,231
15	GENERAL BUILDING CONTRACTORS	115
16	HEAVY CONSTRUCTION CONTRACTORS	1,874
17	SPECIAL TRADE CONTRACTORS	5,832
20	FOOD AND KINDRED PRODUCTS	1,640
21	TOBACCO MANUFACTURERS	3
22	TEXTILE MILL PRODUCTS	533
23	APPAREL AND OTHER TEXTILE PRODUCTS	1,735	1,202
24	LUMBER AND WOOD PRODUCTS	826
26	PAPER AND ALLIED PRODUCTS	984
27	PRINTING AND PUBLISHING	136
28	CHEMICALS AND ALLIED PRODUCTS	4,351	382
29	PETROLEUM AND COAL PRODUCTS	2,937	105
30	RUBBER AND MISC. PLASTICS PRODUCTS	49
32	STONE, CLAY, AND GLASS PRODUCTS	1,710
33	PRIMARY METAL INDUSTRIES	783	5
34	FABRICATED METAL PRODUCTS	436
35	MACHINERY, EXCEPT ELECTRICAL	9,622	139
36	ELECTRIC AND ELECTRONIC EQUIPMENT	623	206
37	TRANSPORTATION EQUIPMENT	3,106	128
41	LOCAL AND INTERURBAN PASSENGER TRANSIT	626
42	TRUCKING AND WAREHOUSING	5,118
45	TRANSPORTATION BY AIR	1,687
49	ELECTRIC, GAS, AND SANITARY SERVICES	3,192	42
50	WHOLESALE TRADE - DURABLE GOODS	6,128
51	WHOLESALE TRADE - NONDURABLE GOODS	489
55	AUTOMOTIVE DEALERS & SERVICE STATIONS	4,100
73	BUSINESS SERVICES	807
75	AUTO REPAIR, SERVICES, AND GARAGES	12,397
76	MISCELLANEOUS REPAIR SERVICES	5,979
80	HEALTH SERVICES	7,718	4,939
TOTAL		93,804	7,148

*(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.