 Those of Hispanic or Latino origin made up 1.2% of the population.In terms of ancestry, 21.8% were German, 18.7% were Irish, 15.9% were English, 9.4% were American, and 5.7% were Italian.Of the 16,617 households, 30.0% had children under the age of 18 living with them, 48.8% were married couples living together, 11.6% had a female householder with no husband present, 34.3% were non-families, and 30.0% of all households were made up of individuals.