 The population density was 724.1 inhabitants per square mile (279.5/km2).The 16,647 housing units averaged 491.9 per square mile (189.9/km2).The racial makeup of the city was 90.8% White, 5.9% African American, 0.3% Native American, 1.1% Asian, 0.5% from other races, and 1.4% from two or more races.