 21.8% were of German, 13.6% English, 12.5% Dutch, 12.4% American and 9.6% Irish ancestry according to Census 2000.98.2% spoke only English at home.There were 21,035 households out of which 35.20% had children under the age of 18 living with them, 64.10% were married couples living together, 7.70% had a female householder with no husband present, and 24.00% were non-families.