 Of the 36,867 households, 36.8% had children under the age of 18 living with them, 54.7% were married couples living together, 12.0% had a female householder with no husband present, 27.6% were non-families, and 21.8% of all households were made up of individuals.The average household size was 2.70 and the average family size was 3.13.The median age was 38.9 years.