SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	7,885
16	HEAVY CONSTRUCTION CONTRACTORS	761
17	SPECIAL TRADE CONTRACTORS	6,923
20	FOOD AND KINDRED PRODUCTS	10,515	2,649
22	TEXTILE MILL PRODUCTS	7,985	1,145
27	PRINTING AND PUBLISHING	149
28	CHEMICALS AND ALLIED PRODUCTS	2,222
31	LEATHER AND LEATHER PRODUCTS	786
37	TRANSPORTATION EQUIPMENT	987
73	BUSINESS SERVICES	3,164	939
80	HEALTH SERVICES	3,359	2,150
TOTAL		44,736	6,883

*(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.