 In terms of ancestry, 23.4% were English, 17.4% were German, 9.9% were American, and 7.8% were Irish.Of the 36,629 households, 40.4% had children under the age of 18 living with them, 58.7% were married couples living together, 10.1% had a female householder with no husband present, 26.9% were non-families, and 22.4% of all households were made up of individuals.The average household size was 2.81 and the average family size was 3.32.