How are Pokertracker numbers counted?

[Auren]

I am sure this has been answered here many times but I sure couldn't find it.

Could someone please point me to post that tells how exactly how different poker tracker numbers like "attempted to steal blind", "continuation bet" or "aggression factor" are counted. I wouldn't mind analysis of what different values indicate either but mainly I want to know how exactly they are counted so I understand what they mean.