SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
20	FOOD AND KINDRED PRODUCTS	18,560	1,078
26	PAPER AND ALLIED PRODUCTS	166	43
27	PRINTING AND PUBLISHING	4,069	794
28	CHEMICALS AND ALLIED PRODUCTS	7,921	3,018
29	PETROLEUM AND COAL PRODUCTS	356	56
32	STONE, CLAY, AND GLASS PRODUCTS	359	77
33	PRIMARY METAL INDUSTRIES	2,090	1
34	FABRICATED METAL PRODUCTS	627	27
35	MACHINERY, EXCEPT ELECTRICAL	1,743	93
36	ELECTRIC AND ELECTRONIC EQUIPMENT	1,508	271
37	TRANSPORTATION EQUIPMENT	2,233	59
38	INSTRUMENTS AND RELATED PRODUCTS	238	45
42	TRUCKING AND WAREHOUSING	164
45	TRANSPORTATION BY AIR	8,389	209
47	TRANSPORTATION SERVICES	1,333	1,075
49	ELECTRIC, GAS, AND SANITARY SERVICES	1,381
73	BUSINESS SERVICES	9,023	1,701
80	HEALTH SERVICES	31,826	19,564
TOTAL		91,985	28,113

*(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.