Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
277	STREET AND DOOR-TO-DOOR SALES WORKERS	1,744	734
356	MAIL CLERKS, EXC. POSTAL SERVICE	826	459
365	STOCK AND INVENTORY CLERKS	130	130
453	JANITORS AND CLEANERS	1,129
736	TYPESETTERS AND COMPOSITORS	1,285	367
737	MISCELLANEOUS PRINTING MACHINE OPERATORS	1,411	941
765	FOLDING MACHINE OPERATORS	825	825
TOTAL		7,351	3,456

*(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.