As we can see from the second chart that the tendency of obesity rates and food consumption in 1998 to 2010
In the year between 1998 to 2004, the percentage of the median of state obesity prevalence increased from 1.01 to 1.05, but the real food prices of food at home, limited and full service restaurants and snacks remained steady at 1. In 5 years spanning from 2004 to 2009, the percentage of the median of state obesity prevalence maintained growth from 1.05 to 1.08. The authentic food price of food at home, limited and full service restaurants and snacks decreased firstly, then they considerably increase to reach a peak of 1.01, 1.04 and 1.07, respectively. Ultimately, most lines reduced except median of state obesity prevalence between 2009 and 2010. From this data, fast food becomes more and more prevalent in our society, but it is bad for our health. If we continued to eat much fast food, the percentage of obesity will also continue to grow.