 The population density was 1,644.2 people per square mile (634.9/km2).There were 16,631 housing units at an average density of 733.9 per square mile (283.4/km2).The racial makeup of the city was 75.0% White, 7.5% African American, 2.0% Native American, 5.5% Asian, 0.9% Pacific Islander, 2.6% from other races, and 6.6% from two or more races.