 The population density was 34.4 per square mile (13.3 square kilometers).There were 13,990 housing units at an average density of 18.4 per square mile (7.1 square kilometers).97.2% of the population were White, 0.6% Native American, 0.5% Asian, 0.3% Black or African American, 0.2% of some other race and 1.2% of two or more races.