 Of the 8,146 households, 47.7% had children under the age of 18 living with them, 70.6% were married couples living together, 7.4% had a female householder with no husband present, 17.8% were non-families, and 15.0% of all households were made up of individuals.The average household size was 3.20 and the average family size was 3.57.The median age was 30.0 years.