There were 20,008 households, of which 22.3% had children under the age of 18 living with them, 36.0% were married couples living together, 8.2% had a female householder with no husband present, 3.1% had a male householder with no wife present, and 52.7% were non-families. 30.3% of all households were made up of individuals, and 5.9% had someone living alone who was 65 years of age or older. The average household size was 2.30 and the average family size was 2.82.