SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
16	HEAVY CONSTRUCTION CONTRACTORS	1,405
20	FOOD AND KINDRED PRODUCTS	132
26	PAPER AND ALLIED PRODUCTS	563
33	PRIMARY METAL INDUSTRIES	187
34	FABRICATED METAL PRODUCTS	392
35	MACHINERY, EXCEPT ELECTRICAL	287
36	ELECTRIC AND ELECTRONIC EQUIPMENT	65
37	TRANSPORTATION EQUIPMENT	348
41	LOCAL AND INTERURBAN PASSENGER TRANSIT	194
45	TRANSPORTATION BY AIR	120
75	AUTO REPAIR, SERVICES, AND GARAGES	846
TOTAL		4,538

*(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.