sentences:  In terms of ancestry, 24.0% were German, 15.0% were American, 11.8% were Irish, and 9.0% were English.Of the 14,858 households, 33.3% had children under the age of 18 living with them, 51.8% were married couples living together, 11.3% had a female householder with no husband present, 31.7% were non-families, and 27.3% of all households were made up of individuals.The average household size was 2.55 and the average family size was 3.08.