sentences:  In terms of ancestry, 27.2% were German, 17.3% were American, 12.0% were Irish, and 8.4% were English.Of the 13,456 households, 32.5% had children under the age of 18 living with them, 53.2% were married couples living together, 11.3% had a female householder with no husband present, 30.7% were non-families, and 26.2% of all households were made up of individuals.The average household size was 2.49 and the average family size was 2.97.