sentences:  In terms of ancestry, 26.2% were German, 13.9% were Irish, 11.8% were English, and 11.8% were American.Of the 26,304 households, 37.2% had children under the age of 18 living with them, 61.0% were married couples living together, 9.8% had a female householder with no husband present, 24.8% were non-families, and 20.3% of all households were made up of individuals.The average household size was 2.64 and the average family size was 3.03.