sentences:  Of the 6,918 households, 29.6% had children under the age of 18 living with them, 52.2% were married couples living together, 9.7% had a female householder with no husband present, 33.3% were non-families, and 28.2% of all households were made up of individuals.The average household size was 2.40 and the average family size was 2.91.The median age was 39.6 years.