sentences:  In terms of ancestry, 12.7% were German, 10.4% were American, 9.5% were Irish, and 7.8% were English.Of the 6,130 households, 28.6% had children under the age of 18 living with them, 50.7% were married couples living together, 10.7% had a female householder with no husband present, 33.8% were non-families, and 30.1% of all households were made up of individuals.The average household size was 2.34 and the average family size was 2.88.