 There were 18,821 households, out of which 24.8% had children under the age of 18 living with them, 37.1% were married couples living together, 12.0% had a female householder with no husband present, and 46.8% were non-families.36.1% of all households were made up of individuals, and 6.7% had someone living alone who was 65 years of age or older.The average household size was 2.17 and the average family size was 2.86.