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The Census includes all residents of the United States, regardless of their citizenship status. In some areas of the country, those without American citizenship account for a substantial proportion of the population, while in many areas, particularly in the Midwest, the make up only a small percentage of residents. Likewise, in some areas the majority of the population has come from other states within the U.S. while in others, particularly in the South, the population is more stable over time.

Nativity and Citizenship Status, 1990-2000
1990 2000
Number Percent Number Percent
Total Population 541,174 100.00% 597,635 100.00%
Total Native Population 519,266 95.95% 562,193 94.07%
Born in US 514,326 95.04% 556,920 93.19%
Born in Same State 381,598 70.51% 415,505 69.52%
Born in Different State 132,728 24.53% 141,415 23.66%
Born Outside US 4,940 0.91% 5,273 0.88%
Total Foreign Born Population 21,908 4.05% 35,442 5.93%
Naturalized 14,021 2.59% 20,395 3.41%
Non-Naturalized 7,887 1.46% 15,047 2.52%

Source: Census 2000 analyzed by the Social Science Data Analysis Network (SSDAN).

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