 There were 21,199 housing units at an average density of 25.4 per square mile (9.8 per km²).97.5% of the population were White, 0.4% Asian, 0.4% Black or African American, 0.3% Native American, 0.4% of some other race and 0.9% of two or more races.2.0% were Hispanic or Latino (of any race).