sentences:  In terms of ancestry, 35.3% were German, 15.4% were Irish, 13.4% were American, and 12.5% were English.Of the 22,505 households, 36.4% had children under the age of 18 living with them, 62.7% were married couples living together, 9.2% had a female householder with no husband present, 24.4% were non-families, and 20.7% of all households were made up of individuals.The average household size was 2.62 and the average family size was 3.02.