sentences:  In terms of ancestry, 25.7% were German, 16.1% were Irish, 8.5% were English, and 8.5% were American.Of the 6,362 households, 30.8% had children under the age of 18 living with them, 50.3% were married couples living together, 12.0% had a female householder with no husband present, 33.3% were non-families, and 29.2% of all households were made up of individuals.The average household size was 2.38 and the average family size was 2.91.