You really can't think of a reason why companies like GFK don't track Central and Eastern Europe, South Korea etc RPG? Those markets only became significant very recently. NPD, Chart Track and the other guys do not track everything. The "world markets" report that NPD, Chart Track and Media Create release every month covers 60% of world data by their own admission and thats with Western Europe, the United States and Japan.
There are no monthly figures for the USA or Japanese video game markets from before the late 1980s, and those markets have been established for videogames since the Atari hey-day of the 1970s. It takes a long time before companies track developing markets as you don't want to put in time and research to develop a tracking methodology and then have the market vanish. Digital distribution is a good example nowadays on the three systems - there is yet to be an established tracker for Wii Ware, Xbox Live, PSN etc.
People are difficult to govern because they have too much knowledge.
When there are more laws, there are more criminals.
- Lao Tzu
