SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
16	HEAVY CONSTRUCTION CONTRACTORS	309
17	SPECIAL TRADE CONTRACTORS	4,135
20	FOOD AND KINDRED PRODUCTS	1,666	26
26	PAPER AND ALLIED PRODUCTS	6,340	27
27	PRINTING AND PUBLISHING	1,381
30	RUBBER AND MISC. PLASTICS PRODUCTS	1,946	580
32	STONE, CLAY, AND GLASS PRODUCTS	4,845
33	PRIMARY METAL INDUSTRIES	8,991
34	FABRICATED METAL PRODUCTS	2,913
35	MACHINERY, EXCEPT ELECTRICAL	8,316	338
36	ELECTRIC AND ELECTRONIC EQUIPMENT	351
37	TRANSPORTATION EQUIPMENT	10,364	18
38	INSTRUMENTS AND RELATED PRODUCTS	878	110
42	TRUCKING AND WAREHOUSING	502
49	ELECTRIC, GAS, AND SANITARY SERVICES	166
TOTAL		53,104	1,098

*(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.