 In terms of ancestry, 40.8% were German, 14.4% were Irish, 10.4% were English, 6.7% were Polish, and 5.2% were American.Of the 49,043 households, 29.5% had children under the age of 18 living with them, 50.1% were married couples living together, 9.0% had a female householder with no husband present, 36.9% were non-families, and 27.5% of all households were made up of individuals.The average household size was 2.43 and the average family size was 2.98.