Type 1 diabetes only accounts for 5-10% of cases so you can assume that the numbers most likely mostly come from type 2 diabetes cases. I agree that this is making the data more imprecise than necessary but not completely useless.
That's not entirely true. Weight and diet are definitely risk factors, but so are age, genetics and a history of gestational diabetes. The main thing is that your body becomes resistant to insulin for one reason or another, causing hyperglycemia. Whereas with type 1 your body stops making insulin entirely because your immune system destroys the insulin-producing cells in your pancreas, to the same result.
It's a common sentiment that those who have type 2 are to blame for it, but I had a professor at university who was rail thin and active and had type 2.
Yay, Germany Number Two. /s
We currently have a political debate about this here, since a citizen council and the green party suggested several rules and guidelines around healthy food. Of course, the usual people are now scared that their Schnitzel gets taken away.