SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
16	HEAVY CONSTRUCTION CONTRACTORS	3,129	75
17	SPECIAL TRADE CONTRACTORS	34,528	244
28	CHEMICALS AND ALLIED PRODUCTS	722	52
30	RUBBER AND MISC. PLASTICS PRODUCTS	9,037	1,139
34	FABRICATED METAL PRODUCTS	792
35	MACHINERY, EXCEPT ELECTRICAL	969	8
36	ELECTRIC AND ELECTRONIC EQUIPMENT	2,194	642
37	TRANSPORTATION EQUIPMENT	313
39	MISCELLANEOUS MANUFACTURING INDUSTRIES	30	30
45	TRANSPORTATION BY AIR	291
49	ELECTRIC, GAS, AND SANITARY SERVICES	4,483
80	HEALTH SERVICES	176
TOTAL		56,666	2,190

*(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.