 In terms of ancestry, 19.4% were German, 15.9% were English, 11.8% were Irish, and 8.6% were American.Of the 148,445 households, 35.6% had children under the age of 18 living with them, 52.4% were married couples living together, 10.0% had a female householder with no husband present, 33.1% were non-families, and 25.0% of all households were made up of individuals.The average household size was 2.58 and the average family size was 3.11.