SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
16	HEAVY CONSTRUCTION CONTRACTORS	456
20	FOOD AND KINDRED PRODUCTS	839
33	PRIMARY METAL INDUSTRIES	1,212
36	ELECTRIC AND ELECTRONIC EQUIPMENT	68	45
37	TRANSPORTATION EQUIPMENT	7,025	442
38	INSTRUMENTS AND RELATED PRODUCTS	262	110
44	WATER TRANSPORTATION	4,340
80	HEALTH SERVICES	219	219
TOTAL		14,420	815

*(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.