SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
26	PAPER AND ALLIED PRODUCTS	43
33	PRIMARY METAL INDUSTRIES	187
35	MACHINERY, EXCEPT ELECTRICAL	2,693	224
36	ELECTRIC AND ELECTRONIC EQUIPMENT	67
37	TRANSPORTATION EQUIPMENT	3,445
40	RAILROAD TRANSPORTATION	312
TOTAL		6,746	224

*(1) By survey design, not all 2-digit SICs were surveyed. (2) The estimates for each 2-digit SIC apply only to the 3- and 4-digit SICs surveyed within the 2-digit SIC. Not all SICs were surveyed. (3) When using the estimates, standard errors associated with estimates should be considered. (4) 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.