Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
105	THERAPISTS, N.E.C.	219	219
259	SALES REPRESENTATIVES, MINING, MANUFACTURING, AND WHOLESALE	354
453	JANITORS AND CLEANERS	255	36
653	SHEET METAL WORKERS	771
707	ROLLING MACHINE OPERATORS	71
735	PHOTOENGRAVERS AND LITHOGRAPHERS	18
737	MISCELLANEOUS PRINTING MACHINE OPERATORS	217
774	PHOTOGRAPHIC PROCESS MACHINE OPERATORS	63	16
TOTAL		1,968	271

*(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.