SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	3,379
28	CHEMICALS AND ALLIED PRODUCTS	253
30	RUBBER AND MISC. PLASTICS PRODUCTS	11,787	3,818
34	FABRICATED METAL PRODUCTS	1,014	585
36	ELECTRIC AND ELECTRONIC EQUIPMENT	1,893	960
38	INSTRUMENTS AND RELATED PRODUCTS	2,413	930
39	MISCELLANEOUS MANUFACTURING INDUSTRIES	230	54
TOTAL		20,968	6,347

*(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.