Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
073	CHEMISTS, EXCEPT BIOCHEMISTS	7
189	PHOTOGRAPHERS	1,541	180
194	ARTISTS, PERFORMERS, AND RELATED WORKERS, N.E.C.	97
203	CLINICAL LABORATORY TECHNOLOGISTS AND TECHNICIANS	268	212
345	DUPLICATING MACHINE OPERATORS	795	568
453	JANITORS AND CLEANERS	457	36
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	281	28
633	SUPERVISORS, PRODUCTION OCCUPATIONS	113	28
753	CEMENTING AND GLUING MACHINE OPERATORS	468
774	PHOTOGRAPHIC PROCESS MACHINE OPERATORS	317	6
TOTAL		4,344	1,059

*(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.