SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
17	SPECIAL TRADE CONTRACTORS	3,005
28	CHEMICALS AND ALLIED PRODUCTS	921
34	FABRICATED METAL PRODUCTS	2,175	103
35	MACHINERY, EXCEPT ELECTRICAL	1,550	21
36	ELECTRIC AND ELECTRONIC EQUIPMENT	2,891	806
37	TRANSPORTATION EQUIPMENT	2,123	17
38	INSTRUMENTS AND RELATED PRODUCTS	3,652	2,255
73	BUSINESS SERVICES	24
80	HEALTH SERVICES	2,979	1,964
TOTAL		19,320	5,165

*(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.