sentences:  There were 11,755 households out of which 23.1% had children under the age of 18 living with them, 54.5% were married couples living together, 9.3% had a female householder with no husband present, and 31.7% were non-families.27.5% of all households were made up of individuals and 13.0% had someone living alone who was 65 years of age or older.The average household size was 2.29 and the average family size was 2.75.