 43.6% were of German, 17.7% American, 8.1% English and 5.8% Irish ancestry according to Census 2000.There were 15,105 households out of which 33.30% had children under the age of 18 living with them, 57.50% were married couples living together, 9.00% had a female householder with no husband present, and 29.40% were non-families.24.90% of all households were made up of individuals and 10.50% had someone living alone who was 65 years of age or older.