 47.8% were of German, 12.1% Polish and 8.8% Norwegian ancestry.There were 13,065 households out of which 35.30% had children under the age of 18 living with them, 52.10% were married couples living together, 8.80% had a female householder with no husband present, and 34.80% were non-families.25.80% of all households were made up of individuals and 8.90% had someone living alone who was 65 years of age or older.