tbone51 on 27 February 2013
the_dengle said:
NPD is a research group that tracks sales in the USA. Their methods are a bit more reliable than VGChartz. Their data comes out after the end of each month, and VGChartz usually adjusts its numbers to reflect those provided by NPD. |
ok thankz, do they show numbers day 1 of a new month or like a week after?
