was 272.2/km² (705.0/sq mi). There were 20,209 housing units at an average density of 106.3 persons/km² (275.2 persons/sq mi). The racial makeup of the city was 78.36% White , 2.7% African-American , 3.4% Native American , 10.85% from other races , and 4.12% from two or more races. Hispanic or Latino of any