@Acevil Unfortunately the previous generations information isn't as available but it would be interesting.
@theRepublic: That thread is quite interesting, And doing that calculation weekly, ouch ;) . What I would really want to do is have a software per unit over life cycle, but obviously that information is not available. I'm not sure I fully understand the TWO calculation so will need to examine it some more.
It is all in a spreadsheet, so it is not too bad. I just have to put in the numbers for each week. I just haven't updated in a few months and there have been some adjustments to the numbers that I need to account for. I also want to do a regional breakdown.
NNID: theRepublic -- Steam ID: theRepublic
3DS - Currently Gaming Like It's 2011 - The Legend of Zelda: Ocarina of Time 3D - Master Quest
PC - Currently Gaming Like It's 2012 - Borderlands 2
Mobile - The Simpson's Tapped Out and Yugioh Duel Links