SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	1,249
17	SPECIAL TRADE CONTRACTORS	3,313
29	PETROLEUM AND COAL PRODUCTS	517	239
30	RUBBER AND MISC. PLASTICS PRODUCTS	4,662	1,436
32	STONE, CLAY, AND GLASS PRODUCTS	4,626	1,954
34	FABRICATED METAL PRODUCTS	848
35	MACHINERY, EXCEPT ELECTRICAL	18,888	5,006
36	ELECTRIC AND ELECTRONIC EQUIPMENT	5,882	4,801
37	TRANSPORTATION EQUIPMENT	3,851	75
38	INSTRUMENTS AND RELATED PRODUCTS	9,210	6,087
45	TRANSPORTATION BY AIR	4,382
49	ELECTRIC, GAS, AND SANITARY SERVICES	981
51	WHOLESALE TRADE - NONDURABLE GOODS	1,292
73	BUSINESS SERVICES	7
80	HEALTH SERVICES	124	124
TOTAL		59,832	19,722

*(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.