There were 4,280 households of which 32.9% had children under the age of 18 living with them, 39.2% were married couples living together, 16.4% had a female householder with no husband present, 5.7% had a male householder with no wife present, and 38.7% were non-families. 32.0% of all households were made up of individuals and 14% had someone living alone who was 65 years of age or older. The average household size was 2.34 and the average family size was 2.90.. which household was least common?