 Those of Hispanic or Latino origin made up 3.0% of the population.In terms of ancestry, 32.2% were German, 17.6% were Irish, 13.5% were English, 6.4% were Norwegian, and 4.4% were American.Of the 5,605 households, 25.4% had children under the age of 18 living with them, 48.5% were married couples living together, 8.7% had a female householder with no husband present, 37.4% were non-families, and 31.3% of all households were made up of individuals.