sentences:  There were 22,576 households, out of which 28.7% had children under the age of 18 living with them, 46.0% were married couples living together, 15.6% had a female householder with no husband present, and 33.9% were non-families.29.9% of all households were made up of individuals, and 11.4% had someone living alone who was 65 years of age or older.The average household size was 2.42 and the average family size was 2.99.