TWRoO on 14 December 2007
oh so it was a doubling of lifetime sales.
You should bare in mind it is easy to do that as it only has to sell the same for y2 as it did y1.
It also seems by those numbers that PS2 didn't double its 2nd year LTD with it's 3rd year [unlike PS1]
I think what you should be considering is numbers over percentages/multipliers, because i believe in Japan this year the 360 will have doubled it's life sales, but it is clear 360 is not doing great there.
I also find it odd you are using fiscal year ends for PS1/2/3 but calender year for 360.
