Eating time and obesity

This interesting graph seems to show that there is a negative correlation between how much time you spend on eating and obesity.


(click to enlarge; source: NYT)


Less time spent on eating could mean people eat more fast food, which tend to be less healthy. Slow eating also helps you digest better, possibly preventing building up fat.

New Zealanders seem to be an outlier in the graph. This could be they eat too much dairy food.