So it's recently shipped 60 million since it's early 2005 launch, so with 5 years on the shelf it's at an average of 12 million per year (pretty impressive)
Sales have dipped, the PSPgo hasn't been the greatest of successes, and anymore revision arn't going to bring anything significant to the table to spur sales.
Going by VGChartz numbers, last year the PSP sold 9.5 million, however it's sales have severly dipped in the US recently. To hit 100 million it would need to stay on the market until 2014 at it's current pace.













