re: PT stats, how many hands needed to see patterns?

[questions]

I've had PT since last year, and was curious to know how many hands I need in my database before I can start seeing how my stats compare with a perfectly random distribution? Specifically, I have 5000 hands in my database on FTP and while my pocket eights have won every single time of the 12 times I've had them, my kings have won 65% of the time. That seems odd.