 In terms of ancestry, 15.5% were German, 13.4% were Irish, 13.1% were English, 5.4% were Italian, and 5.0% were American.Of the 64,945 households, 28.5% had children under the age of 18 living with them, 55.4% were married couples living together, 10.7% had a female householder with no husband present, 30.2% were non-families, and 24.3% of all households were made up of individuals.The average household size was 2.42 and the average family size was 2.84.