sentences:  There were 27,736 households out of which 29.60% had children under the age of 18 living with them, 51.10% were married couples living together, 12.20% had a female householder with no husband present, and 33.50% were non-families.29.70% of all households were made up of individuals and 12.30% had someone living alone who was 65 years of age or older.The average household size was 2.31 and the average family size was 2.86.