SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
17	SPECIAL TRADE CONTRACTORS	699
33	PRIMARY METAL INDUSTRIES	16
36	ELECTRIC AND ELECTRONIC EQUIPMENT	309	287
37	TRANSPORTATION EQUIPMENT	14
38	INSTRUMENTS AND RELATED PRODUCTS	5,609	3,952
45	TRANSPORTATION BY AIR	798
73	BUSINESS SERVICES	36
80	HEALTH SERVICES	28	7
TOTAL		7,510	4,246

*(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.