sentences:  Of the 13,758 households, 30.0% had children under the age of 18 living with them, 51.2% were married couples living together, 10.0% had a female householder with no husband present, 34.1% were non-families, and 28.8% of all households were made up of individuals.The average household size was 2.41 and the average family size was 2.94.The median age was 42.0 years.