SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
16	HEAVY CONSTRUCTION CONTRACTORS	65
27	PRINTING AND PUBLISHING	1,345	331
28	CHEMICALS AND ALLIED PRODUCTS	635	92
35	MACHINERY, EXCEPT ELECTRICAL	74
37	TRANSPORTATION EQUIPMENT	2,336	159
80	HEALTH SERVICES	2,074	1,932
TOTAL		6,529	2,515

*(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.