 In terms of ancestry, 43.5% were German, 13.1% were Irish, 10.7% were American, and 8.7% were English.Of the 27,375 households, 29.9% had children under the age of 18 living with them, 50.0% were married couples living together, 10.7% had a female householder with no husband present, 35.4% were non-families, and 30.1% of all households were made up of individuals.The average household size was 2.37 and the average family size was 2.94.