There were 8,598 households, of which 32.4% had children under the age of 18 living with them, 68.9% were married couples living together, 5.1% had a female householder with no husband present, 2.4% had a male householder with no wife present, and 23.7% were non-families. 20.3% of all households were made up of individuals, and 11.3% had someone living alone who was 65 years of age or older. The average household size was 2.56 and the average family size was 2.97.