 There were 17,696 households out of which 29.80% had children under the age of 18 living with them, 56.10% were married couples living together, 8.40% had a female householder with no husband present, and 31.50% were non-families.27.20% of all households were made up of individuals and 12.20% 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 2.93.