 41.0% were of Norwegian, 18.8% German and 10.7% Swedish ancestry.There were 6,190 households out of which 38.40% had children under the age of 18 living with them, 60.00% were married couples living together, 6.80% had a female householder with no husband present, and 28.30% were non-families.24.60% of all households were made up of individuals and 9.90% had someone living alone who was 65 years of age or older.