 Hispanic or Latino of any race were 1.67% of the population.35.5% were of German and 31.2% Norwegian ancestry.There were 22,671 households out of which 30.3% had children under the age of 18 living with them, 60.1% were married couples living together, 6.1% had a female householder with no husband present, and 30.4% were non-families.