SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
16	HEAVY CONSTRUCTION CONTRACTORS	456
17	SPECIAL TRADE CONTRACTORS	24,009
27	PRINTING AND PUBLISHING	285
30	RUBBER AND MISC. PLASTICS PRODUCTS	1,451	108
34	FABRICATED METAL PRODUCTS	368
35	MACHINERY, EXCEPT ELECTRICAL	1,220
36	ELECTRIC AND ELECTRONIC EQUIPMENT	451	69
37	TRANSPORTATION EQUIPMENT	1,732	102
38	INSTRUMENTS AND RELATED PRODUCTS	72
45	TRANSPORTATION BY AIR	55
75	AUTO REPAIR, SERVICES, AND GARAGES	1,268
TOTAL		31,368	279

*(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.