sentences:  In terms of ancestry, 23.0% were German, 14.2% were Irish, 10.6% were American, and 10.3% were English.Of the 46,516 households, 27.2% had children under the age of 18 living with them, 43.4% were married couples living together, 12.2% had a female householder with no husband present, 39.9% were non-families, and 29.6% of all households were made up of individuals.The average household size was 2.34 and the average family size was 2.87.