As of the census of 2000, there were 16,461 people, 6,517 households, and 4,112 families residing in the city. The population density was 1,548.8 people per square mile (597.9/km2). There were 7,536 housing units at an average density of 709.1 per square mile (273.7/km2). The racial makeup of the city was 84.87% White, 0.47% African American, 3.70% Native American, 2.10% Asian, 0.14% Pacific Islander, 5.15% from other races, and 3.57% from two or more races. Hispanic or Latino of any race were 9.22% of the population. 16.4% were of German, 9.3% English, 9.3% American, 8.7% Irish and 5.9% Norwegian ancestry. 90.2% spoke only English, while 7.7% spoke Spanish at home.