SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	12,738
15	GENERAL BUILDING CONTRACTORS	4,419
17	SPECIAL TRADE CONTRACTORS	5,481
20	FOOD AND KINDRED PRODUCTS	539
24	LUMBER AND WOOD PRODUCTS	263
26	PAPER AND ALLIED PRODUCTS	237
27	PRINTING AND PUBLISHING	251
28	CHEMICALS AND ALLIED PRODUCTS	1,287
29	PETROLEUM AND COAL PRODUCTS	53
32	STONE, CLAY, AND GLASS PRODUCTS	2,145
33	PRIMARY METAL INDUSTRIES	75
34	FABRICATED METAL PRODUCTS	4,774
35	MACHINERY, EXCEPT ELECTRICAL	4,628
36	ELECTRIC AND ELECTRONIC EQUIPMENT	107
37	TRANSPORTATION EQUIPMENT	5,108
38	INSTRUMENTS AND RELATED PRODUCTS	2,100
42	TRUCKING AND WAREHOUSING	184
49	ELECTRIC, GAS, AND SANITARY SERVICES	3,266
73	BUSINESS SERVICES	39
76	MISCELLANEOUS REPAIR SERVICES	5,979
TOTAL		53,676

*(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.