As of the census of 2000, there were 18,986 people, 6,947 households, and 5,182 families residing in the city. The population density was 1,260.7 people per square mile (486.8/km2). There were 7,427 housing units at an average density of 493.2 per square mile (190.4/km2). The racial makeup of the city was 87.37% White, 1.64% Black or African American, 1.96% Native American, 2.82% Asian, 3.17% from other races, and 3.03% from two or more races. 6.04% of the population were Hispanic or Latino of any race.