 29.5% were of German, 14.3% Norwegian, 13.0% Swedish, 6.2% Irish, 5.3% United States or American and 5.2% Finnish ancestry.There were 6,644 households out of which 22.60% had children under the age of 18 living with them, 57.50% were married couples living together, 6.30% had a female householder with no husband present, and 32.90% were non-families.28.70% of all households were made up of individuals and 14.00% had someone living alone who was 65 years of age or older.