sentences:  Of the 27,245 households, 29.4% had children under the age of 18 living with them, 48.0% were married couples living together, 13.4% had a female householder with no husband present, 33.9% were non-families, and 28.8% of all households were made up of individuals.The average household size was 2.39 and the average family size was 2.89.The median age was 39.5 years.