SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	100
15	GENERAL BUILDING CONTRACTORS	11,724
16	HEAVY CONSTRUCTION CONTRACTORS	12,782	539
17	SPECIAL TRADE CONTRACTORS	10,585	141
20	FOOD AND KINDRED PRODUCTS	1,712
21	TOBACCO MANUFACTURERS	2
23	APPAREL AND OTHER TEXTILE PRODUCTS	150
24	LUMBER AND WOOD PRODUCTS	1,356
26	PAPER AND ALLIED PRODUCTS	245
27	PRINTING AND PUBLISHING	1,154	36
28	CHEMICALS AND ALLIED PRODUCTS	3,017	10
29	PETROLEUM AND COAL PRODUCTS	1,655
30	RUBBER AND MISC. PLASTICS PRODUCTS	2,201
32	STONE, CLAY, AND GLASS PRODUCTS	954
33	PRIMARY METAL INDUSTRIES	17,310	88
34	FABRICATED METAL PRODUCTS	14,450	71
35	MACHINERY, EXCEPT ELECTRICAL	22,101	601
36	ELECTRIC AND ELECTRONIC EQUIPMENT	2,699	61
37	TRANSPORTATION EQUIPMENT	20,063	192
38	INSTRUMENTS AND RELATED PRODUCTS	232	58
39	MISCELLANEOUS MANUFACTURING INDUSTRIES	2,457	454
44	WATER TRANSPORTATION	774
45	TRANSPORTATION BY AIR	2,668	243
49	ELECTRIC, GAS, AND SANITARY SERVICES	4,231
50	WHOLESALE TRADE - DURABLE GOODS	2,779
76	MISCELLANEOUS REPAIR SERVICES	45
80	HEALTH SERVICES	581	219
TOTAL		138,048	2,712

*(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.