Task: Question Answering
Input (English): Passage: As of 2000, there were 19,306 households out of which 32.8% had children under the age of 18 living with them, 44.0% were married couples living together, 11.6% had a female householder with no husband present, and 39.9% were non-families. 23.2% of all households were made up of individuals and 3.8% had someone living alone who was 65 years of age or older. The average household size was 2.59 and the average family size was 3.13. 
Question: How many more percent are married couples than non-families? 
Answer type: Number 
Output (English): 4.1.