 Of the 15,131 households, 33.5% had children under the age of 18 living with them, 44.9% were married couples living together, 18.4% had a female householder with no husband present, 30.9% were non-families, and 26.8% of all households were made up of individuals.The average household size was 2.54 and the average family size was 3.07.The median age was 40.7 years.