Where can I find data on the number of people migrating out of cities to settle in the suburbs?

• See U.S Census Bureau's "Table A-3. Inmigration, Outmigration, and Net Migration for Metropolitan Areas: 1985-2001"
• Read PRB's "Americans Flocking to Outer Suburbs in Record Numbers"
• See also U.S Census Bureau's Domestic Net Migration in the United States: 2000 to 2004 (PDF: 511MB)