 Those of Hispanic or Latino origin made up 2.9% of the population.In terms of ancestry, 15.9% were American, 13.6% were Irish, 10.8% were English, and 10.2% were German.Of the 73,829 households, 33.3% had children under the age of 18 living with them, 51.1% were married couples living together, 14.5% had a female householder with no husband present, 29.7% were non-families, and 25.4% of all households were made up of individuals.