SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
17	SPECIAL TRADE CONTRACTORS	5,307
20	FOOD AND KINDRED PRODUCTS	14,577	750
24	LUMBER AND WOOD PRODUCTS	194
28	CHEMICALS AND ALLIED PRODUCTS	427	16
36	ELECTRIC AND ELECTRONIC EQUIPMENT	492	32
47	TRANSPORTATION SERVICES	258	86
73	BUSINESS SERVICES	1,822	230
TOTAL		23,077	1,113

*(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.