No two peopl are alike. Even sibs. (For years my brother was two inches shorter than me, he's now my height.)
Everyones body is different also, so what I or anyone else went through would be different than you. It is possible that you and parts of your body are not done growing. But then again you may be done. Your size is only as important as you make it. Alot of women say it's not the size but how you use it. Some women may disagree.
Who knows? We all do the whole growth and puberty thing for different times. You may still have some growing to do but if not, be happy with what you have and take good care of it. It's the only set you'll ever have!