How much weight do you gain each year? I'm only 15 and this year I have gained 6 kgs (13 lbs). Last year I gained 4 kgs (8 lbs), and the year before that I gained 3 kgs (6 lbs). I now weigh 57 kgs (125 lbs) . I seem to be gaining more each year so I am definitely going to join a gym this year. Does anyone else who doesn't exercise much gain this much weight a year?

So the main question, how much weight do you usually gain a year?