 19.8% were of German, 15.1% Italian, 13.1% Irish, 8.8% English, 6.5% Polish, 5.5% Slovene and 5.4% American ancestry according to Census 2000.There were 18,797 households out of which 35.8% had children under the age of 18 living with them, 63.6% were married couples living together, 8.9% had a female householder with no husband present, and 24.3% were non-families.20.5% of all households were made up of individuals and 8.1% had someone living alone who was 65 years of age or older.