there were 12,663 households out of which 39.3% of those had children under the age of 18 living with them, 64.8% were married couples living together, 8.3% had a female householder with no husband present, and 24.6% were non-families. 20.9% of all households were made up of individuals and 8.0% had someone living alone who was 65 years of age or older. the average household size was 2.67 and the average family size was 3.11.