SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	6,037
15	GENERAL BUILDING CONTRACTORS	415
17	SPECIAL TRADE CONTRACTORS	684
20	FOOD AND KINDRED PRODUCTS	428
22	TEXTILE MILL PRODUCTS	94
24	LUMBER AND WOOD PRODUCTS	274
28	CHEMICALS AND ALLIED PRODUCTS	1,145
29	PETROLEUM AND COAL PRODUCTS	490
30	RUBBER AND MISC. PLASTICS PRODUCTS	215
32	STONE, CLAY, AND GLASS PRODUCTS	50
33	PRIMARY METAL INDUSTRIES	1,289
34	FABRICATED METAL PRODUCTS	243
35	MACHINERY, EXCEPT ELECTRICAL	381
36	ELECTRIC AND ELECTRONIC EQUIPMENT	227	110
37	TRANSPORTATION EQUIPMENT	1,531	17
46	PIPE LINES, EXCEPT NATURAL GAS	1,197
50	WHOLESALE TRADE - DURABLE GOODS	575
72	PERSONAL SERVICES	32
73	BUSINESS SERVICES	300	49
TOTAL		15,607	176

*(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.