SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
07	AGRICULTURAL SERVICES	3,442
13	OIL AND GAS EXTRACTION	38,581
15	GENERAL BUILDING CONTRACTORS	47,172	879
16	HEAVY CONSTRUCTION CONTRACTORS	90,357	3,481
17	SPECIAL TRADE CONTRACTORS	64,017
20	FOOD AND KINDRED PRODUCTS	22,450	118
21	TOBACCO MANUFACTURERS	3
22	TEXTILE MILL PRODUCTS	1,535
23	APPAREL AND OTHER TEXTILE PRODUCTS	171
24	LUMBER AND WOOD PRODUCTS	21,991
25	FURNITURE AND FIXTURES	390
26	PAPER AND ALLIED PRODUCTS	2,188	7
27	PRINTING AND PUBLISHING	16,502	2,122
28	CHEMICALS AND ALLIED PRODUCTS	4,349	79
29	PETROLEUM AND COAL PRODUCTS	24,989	1,154
30	RUBBER AND MISC. PLASTICS PRODUCTS	75
32	STONE, CLAY, AND GLASS PRODUCTS	18,027	164
33	PRIMARY METAL INDUSTRIES	6,281	50
34	FABRICATED METAL PRODUCTS	8,841
35	MACHINERY, EXCEPT ELECTRICAL	12,636	2,132
36	ELECTRIC AND ELECTRONIC EQUIPMENT	53
37	TRANSPORTATION EQUIPMENT	7,121
38	INSTRUMENTS AND RELATED PRODUCTS	125
39	MISCELLANEOUS MANUFACTURING INDUSTRIES	633	363
40	RAILROAD TRANSPORTATION	2,545
41	LOCAL AND INTERURBAN PASSENGER TRANSIT	4,792
42	TRUCKING AND WAREHOUSING	63,564	134
44	WATER TRANSPORTATION	5,255
45	TRANSPORTATION BY AIR	6,925
46	PIPE LINES, EXCEPT NATURAL GAS	4,190
47	TRANSPORTATION SERVICES	86
48	COMMUNICATION	16,851	361
49	ELECTRIC, GAS, AND SANITARY SERVICES	44,246	3,313
50	WHOLESALE TRADE - DURABLE GOODS	48,538
51	WHOLESALE TRADE - NONDURABLE GOODS	34,774	4,783
55	AUTOMOTIVE DEALERS & SERVICE STATIONS	41,095	885
73	BUSINESS SERVICES	4,515	1,258
75	AUTO REPAIR, SERVICES, AND GARAGES	39,284
76	MISCELLANEOUS REPAIR SERVICES	7,866
80	HEALTH SERVICES	607
TOTAL		717,089	21,282

*(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.