SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	1,182
15	GENERAL BUILDING CONTRACTORS	20,945
16	HEAVY CONSTRUCTION CONTRACTORS	819
17	SPECIAL TRADE CONTRACTORS	72,315
20	FOOD AND KINDRED PRODUCTS	157
24	LUMBER AND WOOD PRODUCTS	903
26	PAPER AND ALLIED PRODUCTS	1,581	165
28	CHEMICALS AND ALLIED PRODUCTS	2,546	174
29	PETROLEUM AND COAL PRODUCTS	8,684
30	RUBBER AND MISC. PLASTICS PRODUCTS	428	36
32	STONE, CLAY, AND GLASS PRODUCTS	13,561	1,390
33	PRIMARY METAL INDUSTRIES	7,153	28
34	FABRICATED METAL PRODUCTS	2,724	621
35	MACHINERY, EXCEPT ELECTRICAL	11,911	1,205
36	ELECTRIC AND ELECTRONIC EQUIPMENT	8,002	3,487
37	TRANSPORTATION EQUIPMENT	14,732	1,436
39	MISCELLANEOUS MANUFACTURING INDUSTRIES	500	500
42	TRUCKING AND WAREHOUSING	1,047
45	TRANSPORTATION BY AIR	8,299	227
48	COMMUNICATION	101
49	ELECTRIC, GAS, AND SANITARY SERVICES	5,085	87
50	WHOLESALE TRADE - DURABLE GOODS	8,309
51	WHOLESALE TRADE - NONDURABLE GOODS	2,025
55	AUTOMOTIVE DEALERS & SERVICE STATIONS	7,277
73	BUSINESS SERVICES	115	36
75	AUTO REPAIR, SERVICES, AND GARAGES	12,110
76	MISCELLANEOUS REPAIR SERVICES	1,380
80	HEALTH SERVICES	1,375	335
TOTAL		215,265	9,727

*(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.