SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	4,107
15	GENERAL BUILDING CONTRACTORS	4,563
16	HEAVY CONSTRUCTION CONTRACTORS	15,051
17	SPECIAL TRADE CONTRACTORS	10,450
20	FOOD AND KINDRED PRODUCTS	1,712
22	TEXTILE MILL PRODUCTS	4,215	188
24	LUMBER AND WOOD PRODUCTS	3,183	729
26	PAPER AND ALLIED PRODUCTS	1,126
28	CHEMICALS AND ALLIED PRODUCTS	1,096
29	PETROLEUM AND COAL PRODUCTS	112
30	RUBBER AND MISC. PLASTICS PRODUCTS	706	64
32	STONE, CLAY, AND GLASS PRODUCTS	3,248	6
33	PRIMARY METAL INDUSTRIES	2,430
34	FABRICATED METAL PRODUCTS	7,878	1,805
35	MACHINERY, EXCEPT ELECTRICAL	5,680	140
36	ELECTRIC AND ELECTRONIC EQUIPMENT	843	408
37	TRANSPORTATION EQUIPMENT	1,996	77
38	INSTRUMENTS AND RELATED PRODUCTS	233	39
41	LOCAL AND INTERURBAN PASSENGER TRANSIT	3,897
42	TRUCKING AND WAREHOUSING	339
45	TRANSPORTATION BY AIR	599
47	TRANSPORTATION SERVICES	258	86
75	AUTO REPAIR, SERVICES, AND GARAGES	4,984
80	HEALTH SERVICES	1,153	704
TOTAL		79,861	4,247

*(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.