According to a National Research Council report, Explaining Divergent Levels of Longevity in High-Income Countries, life expectancy in the United States continues to increase, but at a slower rate than in the past. The most likely culprits are smoking and obesity; the latter may account from 1/5 to 1/3 of the reduced rate. According to the CIA World Factbook, the United States currently ranks 49th in the world in life expectancy. (Monaco, at nearly 90, is first.)
To learn more about life expectancy, click here.
In another study, Circulation: Journal of the American Heart Association reports that the costs of heart disease are expected to triple over the next twenty years. Combined costs in dollars and lost productivity are expect to rise from $445B today to $1.094T.