SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
28	CHEMICALS AND ALLIED PRODUCTS	2,924	236
33	PRIMARY METAL INDUSTRIES	3,066	567
35	MACHINERY, EXCEPT ELECTRICAL	3,381	1,482
36	ELECTRIC AND ELECTRONIC EQUIPMENT	113	55
38	INSTRUMENTS AND RELATED PRODUCTS	2,294	845
51	WHOLESALE TRADE - NONDURABLE GOODS	6,161	474
TOTAL		17,939	3,658

*(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.