 51.9% were of German, 14.1% Norwegian and 5.6% American ancestry.There were 4,556 households out of which 29.80% had children under the age of 18 living with them, 60.00% were married couples living together, 5.40% had a female householder with no husband present, and 31.60% were non-families.28.50% of all households were made up of individuals and 13.40% had someone living alone who was 65 years of age or older.