Table 1: Percentage of US population in metropolitan areas (MSAs), 1980–2010.

MSA size1980199020002010

Over 5 million20.421.129.924.6
1 up to 5 million25.228.927.629.5
Up to 1 million29.227.522.929.5
Nonmetro areas25.222.519.616.4

Total100100100100