 Of the 15,075 households, 31.0% had children under the age of 18 living with them, 53.0% were married couples living together, 9.9% had a female householder with no husband present, 31.9% were non-families, and 27.0% of all households were made up of individuals.The average household size was 2.43 and the average family size was 2.93.The median age was 40.7 years.