TOD:
Well, yes, this is a personal topic, isn't it?
Obviously, at birth we all weighed the least (barring any infancy infections which caused us to lose weight).
As for myself, I remained thin and angular until the third grade. It was at that point in time that I was put on prescription prednisone, which puffed my cheeks (butt and facial) and began a weight gain which continued for quite a while.
When I graduated high school, I weighed in at 326 pounds.
When I started college the following fall, I weighed 170 pounds.
I went from a 46 inch waist to a 32 inch waist in the space of a summer, thanks to proper diet and exercise. No drugs were involved.
There was a point, when I began working a Carnegie Mellon in the early 80s, that I was down to a 28 inch waist and carried 130 pounds on a six-foot-two frame.
These days, my weight goes between 180 and 220 depending on the season, and my waist fluctuates between 40 and 38 inches.
Right now, I'm wearing size 38 inch shorts, though last summer at this same time, I was down to 36 - accounted for by the constant lifting, non-sleeping, non-eating, non-everything of working the graveyard shift (10pm - 6:30am).
Now I'm not lifting merchandise except to put in my shopping cart, but am still walking miles a day.
There's not much extra on the old bones, but enough to drop it as the year progresses.
ps - I'm almost certain that there are photos of nearly every stage of these weighty issues.