SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
20	FOOD AND KINDRED PRODUCTS	302
30	RUBBER AND MISC. PLASTICS PRODUCTS	36
35	MACHINERY, EXCEPT ELECTRICAL	2,612	10
45	TRANSPORTATION BY AIR	4,099
49	ELECTRIC, GAS, AND SANITARY SERVICES	1,006	42
75	AUTO REPAIR, SERVICES, AND GARAGES	1,751
80	HEALTH SERVICES	284
TOTAL		10,090	52

*(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.