SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
07	AGRICULTURAL SERVICES	666	403
13	OIL AND GAS EXTRACTION	13,183
15	GENERAL BUILDING CONTRACTORS	20,730	208
16	HEAVY CONSTRUCTION CONTRACTORS	13,831	75
17	SPECIAL TRADE CONTRACTORS	63,676
20	FOOD AND KINDRED PRODUCTS	6,158	248
21	TOBACCO MANUFACTURERS	51
22	TEXTILE MILL PRODUCTS	439
23	APPAREL AND OTHER TEXTILE PRODUCTS	1,692
24	LUMBER AND WOOD PRODUCTS	4,550	1,467
25	FURNITURE AND FIXTURES	95
26	PAPER AND ALLIED PRODUCTS	1,230
27	PRINTING AND PUBLISHING	6,689	576
28	CHEMICALS AND ALLIED PRODUCTS	166
29	PETROLEUM AND COAL PRODUCTS	20,516	999
32	STONE, CLAY, AND GLASS PRODUCTS	2,597
33	PRIMARY METAL INDUSTRIES	2,680
34	FABRICATED METAL PRODUCTS	1,762
35	MACHINERY, EXCEPT ELECTRICAL	992
36	ELECTRIC AND ELECTRONIC EQUIPMENT	1,372	3
37	TRANSPORTATION EQUIPMENT	7,740	69
39	MISCELLANEOUS MANUFACTURING INDUSTRIES	159
41	LOCAL AND INTERURBAN PASSENGER TRANSIT	40,026	14,229
42	TRUCKING AND WAREHOUSING	39,000	2,904
44	WATER TRANSPORTATION	10,284	88
45	TRANSPORTATION BY AIR	16,471	2,120
46	PIPE LINES, EXCEPT NATURAL GAS	4,190
47	TRANSPORTATION SERVICES	86
48	COMMUNICATION	19,848	361
49	ELECTRIC, GAS, AND SANITARY SERVICES	9,851
50	WHOLESALE TRADE - DURABLE GOODS	24,052
51	WHOLESALE TRADE - NONDURABLE GOODS	32,766	4,783
55	AUTOMOTIVE DEALERS & SERVICE STATIONS	149,740	23,514
72	PERSONAL SERVICES	2,210	70
73	BUSINESS SERVICES	12,821	1,494
75	AUTO REPAIR, SERVICES, AND GARAGES	34,890
76	MISCELLANEOUS REPAIR SERVICES	1,741	362
80	HEALTH SERVICES	644
TOTAL		570,061	53,971

*(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.