In general, it is clear from the maps that the data about how often people have fast food in 3 years: 2003, 2006, 2013 are used to compare in this diagram. One interesting thing is that most people in USA went to fast food restaurants once a week between 2003 and 2006, and once or twice a month in 2013. The proportion of people eating fast food daily experienced the lowest number in all three years.