SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	4,962
17	SPECIAL TRADE CONTRACTORS	61,026	562
20	FOOD AND KINDRED PRODUCTS	1,117
21	TOBACCO MANUFACTURERS	12
22	TEXTILE MILL PRODUCTS	148
23	APPAREL AND OTHER TEXTILE PRODUCTS	537
24	LUMBER AND WOOD PRODUCTS	872
25	FURNITURE AND FIXTURES	180
26	PAPER AND ALLIED PRODUCTS	575
27	PRINTING AND PUBLISHING	2,313	162
28	CHEMICALS AND ALLIED PRODUCTS	172
30	RUBBER AND MISC. PLASTICS PRODUCTS	2,871	1,500
32	STONE, CLAY, AND GLASS PRODUCTS	10,451	4,373
33	PRIMARY METAL INDUSTRIES	2,824	16
34	FABRICATED METAL PRODUCTS	15,854	1,811
35	MACHINERY, EXCEPT ELECTRICAL	21,266	992
36	ELECTRIC AND ELECTRONIC EQUIPMENT	8,948	2,394
37	TRANSPORTATION EQUIPMENT	8,884	722
38	INSTRUMENTS AND RELATED PRODUCTS	8,455	4,616
39	MISCELLANEOUS MANUFACTURING INDUSTRIES	4,068	850
42	TRUCKING AND WAREHOUSING	1,020
45	TRANSPORTATION BY AIR	76
49	ELECTRIC, GAS, AND SANITARY SERVICES	883
73	BUSINESS SERVICES	1,906	230
76	MISCELLANEOUS REPAIR SERVICES	2,233
80	HEALTH SERVICES	574	227
TOTAL		162,342	18,457

*(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.