Evwn if it is fiscal years, there is one missing if it's been discontinued in 2006.
Maybe there is the reason it's 1.75 over that here (or not, I dunno)
Even if you suppose that another 2 million were manufactured the year it was discontinued, which besides the fact that there is no evidence to support this happened, why would they do that? I mean, is it really plausible for it to have sold 4 million more units after 2005? The PS2 was six years on the market at that point, fully Backwards Compatible with the PS1's software library, and by April 2006 was only $129 new at retail. I can't fathom the amount of sales that people who support the 104.25 total are imagining the PS1 to have enjoyed in the 12th year and beyond of its lifecycle.