At the 2000 census, there were 17,572 people, 7,856 households and 4,713 families residing in the city. The population density was 3,742.2 per square mile (1,443.5/km). There were 8,152 housing units at an average density of 1,736.1 per square mile (669.7/km). The racial makeup of the city was 95.97% White, 0.64% Black, 0.10% Native American, 1.57% Asian, 0.02% Pacific Islander, 0.36% from other races, and 1.33% from two or more races. Hispanic or Latino of any race were 1.50% of the population. Ancestries include German (29.7%), Irish (26.7%), English (10.7%), Polish (8.9%), Italian (8.8%), and Slovak (5.6%).