SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
16	HEAVY CONSTRUCTION CONTRACTORS	4,130
17	SPECIAL TRADE CONTRACTORS	1,760
26	PAPER AND ALLIED PRODUCTS	24
27	PRINTING AND PUBLISHING	1,132
30	RUBBER AND MISC. PLASTICS PRODUCTS	77
32	STONE, CLAY, AND GLASS PRODUCTS	5,311
33	PRIMARY METAL INDUSTRIES	452	49
34	FABRICATED METAL PRODUCTS	1,067	8
35	MACHINERY, EXCEPT ELECTRICAL	2,274	104
36	ELECTRIC AND ELECTRONIC EQUIPMENT	1,533
37	TRANSPORTATION EQUIPMENT	426	17
39	MISCELLANEOUS MANUFACTURING INDUSTRIES	1,253	322
44	WATER TRANSPORTATION	488
45	TRANSPORTATION BY AIR	342
50	WHOLESALE TRADE - DURABLE GOODS	2,963
80	HEALTH SERVICES	270	7
TOTAL		23,502	508

*(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.