sentences:  Of the 15,192 households, 33.7% had children under the age of 18 living with them, 58.5% were married couples living together, 9.5% had a female householder with no husband present, 27.4% were non-families, and 22.8% of all households were made up of individuals.The average household size was 2.56 and the average family size was 2.99.The median age was 40.2 years.