SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	16,201
17	SPECIAL TRADE CONTRACTORS	3,848
20	FOOD AND KINDRED PRODUCTS	293
24	LUMBER AND WOOD PRODUCTS	643	203
27	PRINTING AND PUBLISHING	1,350	50
28	CHEMICALS AND ALLIED PRODUCTS	79
30	RUBBER AND MISC. PLASTICS PRODUCTS	2,078	1,501
32	STONE, CLAY, AND GLASS PRODUCTS	411
34	FABRICATED METAL PRODUCTS	1,293
35	MACHINERY, EXCEPT ELECTRICAL	3,816
36	ELECTRIC AND ELECTRONIC EQUIPMENT	119	9
42	TRUCKING AND WAREHOUSING	206
49	ELECTRIC, GAS, AND SANITARY SERVICES	4,860
50	WHOLESALE TRADE - DURABLE GOODS	2,966
80	HEALTH SERVICES	1,961	998
TOTAL		40,126	2,760

*(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.