Figures are adjusted all the time. It is fairly normal for the previous week to be adjusted when the new week comes in, older weeks also get adjusted often but it is usually only by small amounts except for when significant external data comes in (such as quarterly fiscal reports, or if the monthly NPD report shows a big enough discrepancy, or the rare occasions we get PAL region data from GfK or Chart-Track)

If you are wanting to keep up with this weekly I would suggest re-checking the prior 2 weeks data each time you enter new data... and once every quarter check the whole lot from scratch. (I believe you pulled figures from 2011 for the other platforms as well... if you pulled these recently they are unlikely to change much if at all now, but it might be worth checking the weeks around Christmas in a month or two just in case)

This kind of analysis will be so much easier when we get the graph tools back on the website, as then you can pull up a graph of the PSVita sales for the correct time period and just hover over each week to see if they are adjusted, instead of the current way which involves going through each weekly chart.

I see, well I will readjust tonight and follow that formula you suggested to double check my work. I have seen some talk over NPD adjustments recently and my data is 2 weeks old on the back end.

5.5 million by the end of 2012

Fixed it. Graphs now show the most up to date figures. New sales prediction number is 6,254,767

LBP and Gravity Rush will sell a couple of units, but its the third party games that the vita needs GTA, Monster hunter,ect.

One out of that couple of sales of Gravity Rush will be mine, pre ordering it tomorrow. Got to say, I'm excited for it.

I honestly cant predict the sales of the game, but that game is catching everyones attention inclueding mines  ;D

Thankfully I just won a copy of Sumioni: Demon Arts that will tide me over till then.

I think it can do 8m tops. Around 40m lifetime in 5-6 years.

How did you win it, I heard good things about Sumioni