Increases per year (assuming that there was an approx. 2 year gap between PSAT and SAT, also assuming that a 240 PSAT is equivalent to a 2400 SAT)
I didn't include the OP's scores because based on his/her earlier posts, s/he is lying.
Here they are:
Mean so far: 218 point increase per year
Keep posting people... the mean will become more accurate as we get more samples!