Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
073	CHEMISTS, EXCEPT BIOCHEMISTS	153	76
453	JANITORS AND CLEANERS	4,370
458	HAIRDRESSERS AND COSMETOLOGISTS	14,548	11,393
617	MINING OCCUPATIONS, N.E.C.	159
736	TYPESETTERS AND COMPOSITORS	572	343
756	MIXING AND BLENDING MACHINE OPERATORS	38
774	PHOTOGRAPHIC PROCESS MACHINE OPERATORS	1,908	1,221
779	MACHINE OPERATORS, NOT SPECIFIED	1,149
TOTAL		22,896	13,034

*(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.