 Of the 11,439 households, 31.4% had children under the age of 18 living with them, 55.6% were married couples living together, 9.2% had a female householder with no husband present, 30.8% were non-families, and 26.6% of all households were made up of individuals.The average household size was 2.48 and the average family size was 2.98.The median age was 40.3 years.