There were 10,737 households, out of which 3,428 (31.9%) had children under the age of 18 living in them, 5,681 (52.9%) were opposite-sex married couples living together, 1,185 (11.0%) had a female householder with no husband present, 538 (5.0%) had a male householder with no wife present. There were 661 (6.2%) unmarried opposite-sex partnerships, and 112 (1.0%) same-sex married couples or partnerships. 2,497 households (23.3%) were made up of individuals, and 879 (8.2%) had someone living alone who was 65 years of age or older. The average household size was 2.51. There were 7,404 families (69.0% of all households); the average family size was 2.94. The population was spread out, with 6,068 people (21.4%) under the age of 18, 2,280 people (8.1%) aged 18 to 24, 7,244 people (25.6%) aged 25 to 44, 9,032 people (31.9%) aged 45 to 64, and 3,686 people (13.0%) who were 65 years of age or older. The median age was 41.0 years. For every 100 females, there were 103.2 males. For every 100 females age 18 and over, there were 103.5 males. There were 11,505 housing units at an average density of 440.3 per square mile (170.0/km2), of which 6,827 (63.6%) were owner-occupied, and 3,910 (36.4%) were occupied by renters. The homeowner vacancy rate was 2.2%; the rental vacancy rate was 5.8%. 17,470 people (61.7% of the population) lived in owner-occupied housing units and 9,516 people (33.6%) lived in rental housing units. According to the 2000 census, there were 26,411 people, 9,531 households, and 6,814 families residing in the city. The population density was 987.8 per square mile (381.4/km2). There were 9,848 housing units at an average density of 368.3 per square mile (142.2/km2). The racial makeup of the city was 88.79% White, 2.36% African American, 0.94% Native American, 1.27% Asian, 0.11% Pacific Islander, 3.19% from other races, and 3.34% from two or more races.