SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
20	FOOD AND KINDRED PRODUCTS	1,404	886
22	TEXTILE MILL PRODUCTS	149	4
33	PRIMARY METAL INDUSTRIES	160
35	MACHINERY, EXCEPT ELECTRICAL	23,004	7,966
36	ELECTRIC AND ELECTRONIC EQUIPMENT	687	227
37	TRANSPORTATION EQUIPMENT	26
41	LOCAL AND INTERURBAN PASSENGER TRANSIT	516
45	TRANSPORTATION BY AIR	4,018
49	ELECTRIC, GAS, AND SANITARY SERVICES	670
73	BUSINESS SERVICES	494
TOTAL		31,128	9,084

*(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.