Shooting better on the back 9 compared to the front?

Well..I just have to see what true hardcore golfers do compared to me. Do you guys and gals shoot on average better on the front or back nine? I seem to better my score by atleast 5 shots on the back nine compare to the front. It doesn't matter the course or the order in which I play the holes (ie holes 10-18 then 1-9) I know this is probably due to an improper warm up, but I was just wondering if this happens to anyone else. I ussually shoot mid 90's to low 100's (I'am an all star lol) and in shooting those scores it seems that if i have a good front nine (in my terms below 50) I step it up in the back to try and get that low 90's score. WHATS YOUR TAKE ON THIS?

you answered the question yourself, improper warmup.
Ever wonder why the first hole is so much easier if you end up playing it as your 19th?

The funny thing is tho...Out of all my holes my first is my best, I don't know if its because I just don't have any thaughts in my head of do this do that why did that happen, but out of the few pars I get per round 95% of the time one of them occured on the first hole, I guess its the whole mental battle plus the physical/swing battle