[Jtsummers]

This exists in a system. We have obesity (caused by several factors, diet and activity levels of course and then the factors into those) along with improved medical care. It's like inflating a balloon with a slow leak. The medical care is propping up our life expectancy numbers while our individual behavior is bringing it down. It'll level out or decline at some point as our obese population continues to become a larger percentage and medical improvements stop happening so regularly.