This looks like a mean rather than a median distribution,so our American here is probably heavier than than the "average" normal. Weight distributions are start

This looks like a mean rather than a median distribution,so our American here is probably heavier than than the "average" normal. Weight distributions are starting to skew to the right due to the existence of a small percentage of utterly massive individuals. 15 kilos under normal weight is extremely skinny while being overweight can go into over 100 kilos at the extremes.