OIL AND GAS EXTRACTION (SIC 13)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
889	LABORERS, EXCEPT CONSTRUCTION	11,333
SUBTOTAL		11,333
PRINTING AND PUBLISHING (SIC 27)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
679	BOOKBINDERS	462	231
734	PRINTING MACHINE OPERATORS	462
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	462
SUBTOTAL		1,386	231
TRANSPORTATION BY AIR (SIC 45)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
505	AUTOMOBILE MECHANICS	241
515	AIRCRAFT MECHANICS, EXC. ENGINE	38
SUBTOTAL		279
TOTAL		12,998	231
RELATED PAGES: Estimates by SIC, Estimates by Occupation

*(1) The estimates for each occupation apply only to the 3- and 4-digit SICs surveyed within the 2-digit SIC where the agent was observed. Not all SICs were surveyed, and not all agents were observed in all surveyed SICs. (2) When using the estimates, standard errors associated with estimates should be considered. (3) 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.