Passage: There were 12,816 households out of which 41.70% had children under the age of 18 living with them, 60.30% were married couples living together, 13.00% had a female householder with no husband present, and 21.80% were non-families. 18.90% of all households were made up of individuals and 8.70% had someone living alone who was 65 years of age or older.  The average household size was 2.99 and the average family size was 3.41.

Question: What is the average family size in the nation?
3.41