Has anybody else just stopped growing at 15?

I'm about 16.5 and 5'7, exact same height when I was 15. I used to be average compared to all my peers so I though I was fine and that I would make it to a more average height like 5'9. I've only noticed it the last few months but I haven't grown a bit since 15 (about a year and a half) while everyone around me grew to heights between 5'10 and 6'1 and I became the shortest guy in my class and one of the shortest for my age at my school. Maybe I just reached my genetic potential faster than the others since i have full chest hair and very good beard coverage at 16 that people always tell me I look like I'm in my 20s. I know being 5'7 isn't the end of the world but keep in mind the average height in the country I live in is 5'11 so I'm the shortest in the room most of the time but has anybody else also stopped growing at 15, is it just a normal genetic thing?