sentences:  Of the 5,758 households, 31.8% had children under the age of 18 living with them, 57.6% were married couples living together, 8.9% had a female householder with no husband present, 29.6% were non-families, and 25.5% of all households were made up of individuals.The average household size was 2.51 and the average family size was 3.01.The median age was 40.3 years.