SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	157
15	GENERAL BUILDING CONTRACTORS	179
16	HEAVY CONSTRUCTION CONTRACTORS	3,645
17	SPECIAL TRADE CONTRACTORS	756
20	FOOD AND KINDRED PRODUCTS	1,007
24	LUMBER AND WOOD PRODUCTS	78
26	PAPER AND ALLIED PRODUCTS	109
32	STONE, CLAY, AND GLASS PRODUCTS	652
33	PRIMARY METAL INDUSTRIES	313
36	ELECTRIC AND ELECTRONIC EQUIPMENT	81
38	INSTRUMENTS AND RELATED PRODUCTS	165
39	MISCELLANEOUS MANUFACTURING INDUSTRIES	221
50	WHOLESALE TRADE - DURABLE GOODS	546
76	MISCELLANEOUS REPAIR SERVICES	204
TOTAL		8,115

*(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.