 In terms of ancestry, 33.4% were English, 23.0% were German, 12.0% were Irish, 6.5% were Scottish, 5.1% were Scotch-Irish, and 3.3% were American.Of the 7,668 households, 39.8% had children under the age of 18 living with them, 58.3% were married couples living together, 9.7% had a female householder with no husband present, 27.3% were non-families, and 22.6% of all households were made up of individuals.The average household size was 2.72 and the average family size was 3.19.