age in the city was 33 years. 19.2% of residents were under the age of 18; 20.8% were between the ages of 18 and 24; 21.4% were from 25 to 44; 23.6% were from 45 to 64; and 15% were 65 years of age or older. The gender makeup of the city was 50.3% male and 49.7% female. 2000 census As of the census of 2000, there were 18,701 people, 7,614 households, and 4,332 families residing in the city. The population density was . There were 8,574 housing units at an average density of . The racial makeup of the city was 94.34% White, 3.28% African American, 0.25% Native American, 0.72% Asian, 0.06% Pacific Islander, 0.48% from other races, and 0.88% from two or more races. Hispanic or Latino of any race were 1.02% of the population. There were 7,614 households, out of which 26.3% had children under the age of 18 living with them, 40.8% were married couples living together, 12.4% had a female householder with no husband present, and 43.1% were non-families. 35.8% of all households were made up of individuals, and 14.9% had someone living alone who was 65 years of age or older. The average household size was 2.20 and the average family size was 2.85. In the city, the population was spread out, with 20.0% under the age of 18, 20.5% from 18 to 24, 24.0% from 25 to 44, 20.3% from 45 to 64, and 15.1% who were 65 years of age or older. The median age was 33 years. For every 100 females, there were 98.6 males. For every 100 females age 18 and over, there were 97.3 males. The median income for a household in the city was $26,289, and the median income for a family was $35,424. Males had a median income of $27,029 versus $20,254 for females. The per capita income for the city was $14,993. About 15.0% of families and 20.7% of the population were below the poverty line, including 25.9% of those under age 18 and 12.7% of those age 65 or over. Government The city government consists of a seven-member city council. Five of whom are elected from districts the other two are elected at large. The mayor is elected in a citywide vote. Time zone controversy On November 4, 2007, Knox County joined Daviess, Martin, Pike, and Dubois counties in returning to the Eastern Time zone.