I believe that number. The talk about a coming diabetes crisis is probably correct.
I personally attribute it to the ubiquity of sugar, particularly in HFS form, and a lack of physical activity. The people who statistically live the longest are found in Okinawa and certain Mediterranean islands. In both cases people engage in regular physical work and have diets that are far, far different than those founds in America. High veg, low/lean meat intake. We do it the other way around, then go crazy with sugar and salt.