SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
17	SPECIAL TRADE CONTRACTORS	3,877
20	FOOD AND KINDRED PRODUCTS	1,334
22	TEXTILE MILL PRODUCTS	82
26	PAPER AND ALLIED PRODUCTS	285
27	PRINTING AND PUBLISHING	63
28	CHEMICALS AND ALLIED PRODUCTS	2,511
32	STONE, CLAY, AND GLASS PRODUCTS	2,286	369
33	PRIMARY METAL INDUSTRIES	9,686
34	FABRICATED METAL PRODUCTS	2,938
35	MACHINERY, EXCEPT ELECTRICAL	3,019
36	ELECTRIC AND ELECTRONIC EQUIPMENT	771	103
37	TRANSPORTATION EQUIPMENT	6,248	1,615
38	INSTRUMENTS AND RELATED PRODUCTS	5,841	2,489
39	MISCELLANEOUS MANUFACTURING INDUSTRIES	589
45	TRANSPORTATION BY AIR	817
73	BUSINESS SERVICES	20
76	MISCELLANEOUS REPAIR SERVICES	1,269
TOTAL		41,637	4,576

*(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.