The issue of precision vs accuracy rears its head again.
Obviously the data is not accurate to as many significant digits as is presented, but then the question arises as to how accurate it actually is? Unfortunately, as evidenced by the sometimes drastic swings in the difference between VG Chartz data and NPD data, VG Chartz does not yet have predictable accuracy. So there's currently no way of knowing to what place to round the data. Rounding the data would be as artificial as leaving it as it is.
At least, that's how I see the problem








