 Of the 72,558 households, 33.80% had children under the age of 18 living with them, 55.40% were married couples living together, 10.20% had a female householder with no husband present, and 30.90% were not families.About 25.20% of all households were made up of individuals, and 7.40% had someone living alone who was 65 years of age or older.The average household size was 2.50 and the average family size was 3.00.