 Of the 12,917 households, 32.9% had children under the age of 18 living with them, 58.1% were married couples living together, 9.0% had a female householder with no husband present, 28.3% were non-families, and 23.9% of all households were made up of individuals.The average household size was 2.52 and the average family size was 2.96.The median age was 37.9 years.