Statistics for Grand Rapids from American FactFinder, from the U.S. Census Bureau.
At this site, you will find the following information about Grand Rapids:

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• Population, demographic, and housing information from the 2000 Census: Summary Tape File 1A and Summary Tape File 3A tables.
• 2002 Population estimates for all counties in Michigan
• Income and poverty,1998 model based estimates
• 1997 Economic Census
• County Business Patterns Economic Profile: 1993-2001
• USA Counties General Profile: 1994 | 1996 | 1998