SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	14,820
15	GENERAL BUILDING CONTRACTORS	10,698	79
16	HEAVY CONSTRUCTION CONTRACTORS	10,672
17	SPECIAL TRADE CONTRACTORS	47,771
20	FOOD AND KINDRED PRODUCTS	5,998
21	TOBACCO MANUFACTURERS	28
22	TEXTILE MILL PRODUCTS	1,102
24	LUMBER AND WOOD PRODUCTS	666
25	FURNITURE AND FIXTURES	672	224
26	PAPER AND ALLIED PRODUCTS	2,555
27	PRINTING AND PUBLISHING	31
28	CHEMICALS AND ALLIED PRODUCTS	7,910	323
29	PETROLEUM AND COAL PRODUCTS	3,187
30	RUBBER AND MISC. PLASTICS PRODUCTS	3,565
31	LEATHER AND LEATHER PRODUCTS	48
32	STONE, CLAY, AND GLASS PRODUCTS	1,959
33	PRIMARY METAL INDUSTRIES	15,647	233
34	FABRICATED METAL PRODUCTS	30,220	46
35	MACHINERY, EXCEPT ELECTRICAL	20,171	164
36	ELECTRIC AND ELECTRONIC EQUIPMENT	4,479	441
37	TRANSPORTATION EQUIPMENT	8,842	163
38	INSTRUMENTS AND RELATED PRODUCTS	719	125
39	MISCELLANEOUS MANUFACTURING INDUSTRIES	1,281
42	TRUCKING AND WAREHOUSING	243
44	WATER TRANSPORTATION	12,286	88
45	TRANSPORTATION BY AIR	207
49	ELECTRIC, GAS, AND SANITARY SERVICES	3,090
50	WHOLESALE TRADE - DURABLE GOODS	6,167	247
51	WHOLESALE TRADE - NONDURABLE GOODS	6,743	474
73	BUSINESS SERVICES	1,124
75	AUTO REPAIR, SERVICES, AND GARAGES	118
76	MISCELLANEOUS REPAIR SERVICES	45
80	HEALTH SERVICES	725	155
TOTAL		224,042	2,763

*(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.