sentences:  In 2000 there were 18,466 households, out of which 33.30% had children under the age of 18 living with them, 54.30% were married couples living together, 13.40% had a female householder with no husband present, and 27.60% were non-families.23.50% of all households were made up of individuals, and 8.80% had someone living alone who was 65 years of age or older.The average household size was 2.61 and the average family size was 3.05.