Your sample size is way small.

It's good you're winning, but your current style is way, way exploitable by anyone paying a little bit of attention. Only raising 5% of hands is fine from UTG, but you should be raising way more than that from the button (20% PFR would still be tight).

Do a search for stats. There are tons of threads with tons of discussion.

this is a good link too:
http://forumserver.twoplustwo.com/sh...t=1&PHPSESSID=