SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
16	HEAVY CONSTRUCTION CONTRACTORS	3,129	75
17	SPECIAL TRADE CONTRACTORS	304
26	PAPER AND ALLIED PRODUCTS	1,040
28	CHEMICALS AND ALLIED PRODUCTS	648	31
29	PETROLEUM AND COAL PRODUCTS	966
32	STONE, CLAY, AND GLASS PRODUCTS	246
33	PRIMARY METAL INDUSTRIES	53
34	FABRICATED METAL PRODUCTS	4,129	1,721
35	MACHINERY, EXCEPT ELECTRICAL	16,773	7,624
36	ELECTRIC AND ELECTRONIC EQUIPMENT	8,221	3,849
37	TRANSPORTATION EQUIPMENT	4,788	483
38	INSTRUMENTS AND RELATED PRODUCTS	4,783	2,178
39	MISCELLANEOUS MANUFACTURING INDUSTRIES	147	116
40	RAILROAD TRANSPORTATION	22
44	WATER TRANSPORTATION	774
45	TRANSPORTATION BY AIR	10,027	57
55	AUTOMOTIVE DEALERS & SERVICE STATIONS	853	427
75	AUTO REPAIR, SERVICES, AND GARAGES	4,692
TOTAL		61,595	16,560

*(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.