 35.7% were of German, 24.8% Dutch and 14.3% Norwegian ancestry.There were 4,069 households out of which 31.00% had children under the age of 18 living with them, 57.60% were married couples living together, 6.50% had a female householder with no husband present, and 33.00% were non-families.30.10% of all households were made up of individuals and 17.20% had someone living alone who was 65 years of age or older.