A recent WHO report shows that about 8.5% of the population (about 420 million people) have diabetes. It directly or indirectly prematurely kills about 3.7 million people every year - this is almost certainly mainly a consequence of Type 2 diabetes and worries me a lot.

There is a general account of this here http://www.bbc.com/news/health-35959554 and the (long) WHO report is here as a PDF http://apps.who.int/iris/bitstream/1...7_eng.pdf?ua=1 .