Table 3.
The difference between the GeoLytics and Claritas population estimates from US Census estimates for 2005 and 2007. Claritas data varied to a greater degree than GeoLytics estimates. Aggregating across all counties to compute statewide totals dampened the overall difference from US Census estimates.
| County | GeoLytics 2005 Projection | US Census 2005 Estimate | Percent Difference | Claritas 2007 Projection | US Census 2007 Estimate | Percent Difference |
|---|---|---|---|---|---|---|
| Chippewa | 38,844 | 38,602 | 0.01 | 39,951 | 38,922 | 0.03 |
| Ingham | 278,119 | 281,002 | -0.01 | 234,976 | 279,295 | -0.16 |
| Ionia | 64,468 | 63,891 | 0.01 | 65,309 | 64,053 | 0.02 |
| Jackson | 163,432 | 162,702 | 0.00 | 168,173 | 163,006 | 0.03 |
| Otsego | 24,608 | 24,306 | 0.01 | 24,980 | 24,223 | 0.03 |
| Wayne | 1,990,932 | 2,027,238 | -0.02 | 1,436,542 | 1,985,101 | -0.28 |
| Statewide | 10,100,695 | 10,107,940 | 0.00 | 9,441,691 | 10,071,822 | -0.06 |