 49.9% were of German, 11.7% Norwegian, 6.1% Irish, 5.8% English and 5.5% United States or American ancestry.There were 7,210 households out of which 28.30% had children under the age of 18 living with them, 52.50% were married couples living together, 7.40% had a female householder with no husband present, and 37.10% were non-families.33.10% of all households were made up of individuals and 15.00% had someone living alone who was 65 years of age or older.