Poker Tracker Question; RE; check raise statistics

[fasteddy1970]

In the General Info tab there is a section called "more detail" in which you can get your aggression factor and other interesting info on your game. I've got 45,000 hands logged and my check raise percentage is only 1.7% . That seems like a very low number and I'm wondering if anyone out there would care to share their check raise number or tell me what is considered a average check raise %. Thanks in advance.