As of the U.S. Census in 2000, there were 40,238 people, 15,574 households, and 10,559 families living in the city. The population density was 1,173.8 people per square mile (453.2/km). There were 16,378 housing units at an average density of 477.8 per square mile (184.5/km). The racial makeup of the city was 89.50% White, 6.50% Black or African American, 0.38% Native American, 3.63% Asian, 0.03% Pacific Islander, 1.60% from other races, and 1.61% two or more races. Hispanic or Latino of any race were 3.97% of the population. 24.8% were of German, 12.4% English, 12.1% Irish and 7.2% American ancestry.