 In terms of ancestry, 31.8% were German, 22.0% were English, 11.3% were Irish, 6.3% were American, and 5.1% were Scottish.Of the 3,906 households, 32.0% had children under the age of 18 living with them, 56.3% were married couples living together, 5.1% had a female householder with no husband present, 33.6% were non-families, and 25.6% of all households were made up of individuals.The average household size was 2.48 and the average family size was 2.99.