Future of Game sales - BBCNews

[Entroper]

The chart does not show that the Wii and PS3 had sales in 2005.  It only has one data point per year, and the lines in between are only meant to guide the eye.  If you look at 2005, the Wii and PS3 are at 0.  At 2006, they have some sales, because they launched in November 2006.  There is filled-in area in between because that's the layout of the chart.

Is this chart meant to reflect worldwide sales or European sales (or even UK sales)?  Just wondering since it comes from BBCNews.