Chances of me getting into Deerfield? ?

Hi Im currently in grade 8 and I'm interested in applying to Deerfield for grade 10. However, I'm not sure if I have a chance at all. Im currently attending an average public school in Canada. My grades are all A's right now and I'll work hard to maintain them as A's in grade 9. (86% is an A). For sports, I play basketball and volleyball because I'm quite tall. I haven't been very involved in school extracurriculurs, but next year, I'm going to try out for the school play and I'm going to do some volunteer work. Outside of school, I play the piano, I swim, I take art classes, speech art classes, and im part of a volleyball team. Overall, I'm quite an artsy and creative type of person. What are my chances of getting in?