Is 136 lbs over-weight for a fourteen year-old girl?

The majority of the females I know that are my age have a weight that ranges from about 97 lbs to 123 lbs. And the majority of males weigh around 130 lbs. I know I only out-weigh the males by six pounds. But I feel ashamed to know I out-weight my female peers by more than 10 to 20 pounds. I don't know whether or no I should be considered over-weight...well for my age at least. I really hope what I'm saying makes sense...I'm pretty illiterate, so please bare with me...