To understand how great Aaron Rodgers is, one needs to look at historical context for his numbers. The NFL is far more of a passing league now than ever before, and that requires raw passing yardage, touchdown, and interception totals to be examined with a critical eye.
One way to evaluate the best players at the quarterback position is on a per-pass basis. Statistics like yards per attempt, touchdown percentage, and interception percentage are the easiest of these stats to find and can take at least the volume aspect out of the equation.