sentences:  As of the 2000 census, The population density was 68 people per square mile (26/km²).There were 57,701 housing units at an average density of 30 per square mile (12/km²).There were 52,482 households out of which 30.4% had children under the age of 18 living with them, 45.5% were married couples living together, 11.7% had a female householder with no husband present, and 37.5% were non-families.