At the 2000 census there were 16,087 people in 6,239 households, including 4,685 families, in the city. The population density was 3,473.4 people per square mile (1,341.5/km). There were 6,401 housing units at an average density of 1,382.1 per square mile (533.8/km). The racial makeup of the city was 89.0% White, 9.3% African American, 0.01% Native American, 0.7% Asian, 0.01% Pacific Islander, 0.2% from other races, and 0.7% from two or more races. Hispanic or Latino of any race were 1.0%. 21.6% were of German, 20.4% Irish, 10.6% English, 8.6% Italian and 5.1% Polish ancestry according to Census 2000.