Type 1 diabetes is increasing:

http://diabetes.diabetesjournals.org/content/51/12/3353

The reasons are unknown:

http://www.ncbi.nlm.nih.gov/pubmed/23733895

its less caused by diet than lack of mobility. we spend most of our waking day sitting down now. active over weight people with 'bad diets' are healthier than skinny inactive people. but its hard to legislate that, and much easier to pound the shoe on the table about sodas than it is to tell people they need to get up and move