There were 22,400 households, of which 31.6% had children under the age of 18 living with them, 39.5% were married couples living together, 17.8% had a female householder with no husband present, 5.6% had a male householder with no wife present, and 37.1% were non-families. 30.5% of all households were made up of individuals, and 10.5% had someone living alone who was 65 years of age or older. The average household size was 2.39 and the average family size was 2.97.