sentences:  Of the 16,501 households, 33.7% had children under the age of 18 living with them, 54.4% were married couples living together, 10.8% had a female householder with no husband present, 29.5% were non-families, and 24.4% of all households were made up of individuals.The average household size was 2.53 and the average family size was 2.98.The median age was 38.7 years.