sentences:  In terms of ancestry, 25.0% were German, 14.7% were American, 13.7% were Irish, 12.7% were English, and 5.1% were Italian.Of the 13,057 households, 22.0% had children under the age of 18 living with them, 40.0% were married couples living together, 8.0% had a female householder with no husband present, 48.5% were non-families, and 33.9% of all households were made up of individuals.The average household size was 2.19 and the average family size was 2.80.