Selected Manufacturing Statistics for Montgomery County 1997, 1992, 1987, 1982, and 1977
	1997	1992	1987	1982	1977
Manufacturing Establishments	527	591	591	519	492
Employment (1,000)	15.2	18.7	21.4	18.9	14.3
Payroll ($millions)	680	726	623	431	226
Value of Shipments by Manufacturers ($millions)	3,111.9	2,028.4	1,672.8	1,068.8	503.2
Source: U.S. Bureau of the Census, Census of Manufactures; Montgomery County Department of Park and Planning, Research and Technology Center, revised 1/2001