SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
28	CHEMICALS AND ALLIED PRODUCTS	692	62
30	RUBBER AND MISC. PLASTICS PRODUCTS	572	46
33	PRIMARY METAL INDUSTRIES	331
34	FABRICATED METAL PRODUCTS	239
35	MACHINERY, EXCEPT ELECTRICAL	1,697	29
36	ELECTRIC AND ELECTRONIC EQUIPMENT	1,323	1,145
37	TRANSPORTATION EQUIPMENT	7,215	1,266
38	INSTRUMENTS AND RELATED PRODUCTS	1,211	852
45	TRANSPORTATION BY AIR	137
73	BUSINESS SERVICES	1,753	7
TOTAL		15,170	3,407

*(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.