 In terms of ancestry, 54.8% were German, 9.8% were Irish, 5.8% were English, and 5.6% were American.Of the 14,005 households, 32.7% had children under the age of 18 living with them, 56.5% were married couples living together, 8.7% had a female householder with no husband present, 30.3% were non-families, and 25.1% of all households were made up of individuals.The average household size was 2.55 and the average family size was 3.02.