Tom Van Ahn raises a valid point about statistics… however, the RATE of diabetes in the USA has doubled since 1980… not raw incidence. Depending which set of numbers you use the increase in rate will vary a very small amount… but here are mine… in 1980, 5.6 million people out of a total population of 227 million were diagnosed for a rate of about 2.47%. In 2007 it was 5.76 million out of 302 million, for a RATE of 5.76%. Tom is correct in questioning stats.
But I think I am correct.