 Those of Hispanic or Latino origin made up 2.2% of the population.In terms of ancestry, 42.1% were German, 13.1% were Irish, 11.4% were English, 10.8% were Norwegian, and 7.9% were American.Of the 3,636 households, 21.7% had children under the age of 18 living with them, 58.2% were married couples living together, 5.5% had a female householder with no husband present, 33.3% were non-families, and 28.4% of all households were made up of individuals.