There are 19,418 households out of which 11.4% have children under the age of 18 living with them, 23.8% are married couples living together, 9.0% have a female householder with no husband present, and 64.8% are non-families. 41.8% of all households are made up of individuals and 8.0% have someone living alone who is 65 years of age or older. The average household size is 1.92 and the average family size is 2.73.