sentences:  Of the 7,299 households, 35.6% had children under the age of 18 living with them, 47.3% were married couples living together, 11.7% had a female householder with no husband present, 36.0% were non-families, and 28.3% of all households were made up of individuals.The average household size was 2.57 and the average family size was 3.20.The median age was 29.7 years.