Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
073	CHEMISTS, EXCEPT BIOCHEMISTS	496	223
335	FILE CLERKS	192
365	STOCK AND INVENTORY CLERKS	192
446	HEALTH AIDES, EXCEPT NURSING	795	596
549	NOT SPECIFIED MECHANICS AND REPAIRERS	192
677	OPTICAL GOODS WORKERS	3,948	1,967
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	2,093	1,762
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	3,405	846
804	TRUCK DRIVERS, HEAVY	962
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	962
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	1,155
TOTAL		14,394	5,393

*(1) The estimates for each occupation apply across the surveyed industries in which the agent was observed. Not all industries were surveyed, and not all agents were observed in all surveyed industries. (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.