The Link between fast food and weight, its really there

 Countries with the highest density of restaurants per capita were the U.S. and Canada: 7.52 and 7.43 per 100,000 people, respectively. In the U.S. the prevalence of obesity for men and women is about 32%, while in Canada it's about 23%.   Japan, however, has far fewer of the fast-food restaurants, 0.13 per 100,000 people, and a far lower obesity rate: 2.9% for men and 3.3% for women. Similarly, Norway has 0.19 restaurants per 100,000 people and an obesity rate of 6.4% for men and 5.9% for women.

(2012) (2008)