We at NetApplications understand that our numbers are different from others who report market share. We are the only provider (as far as we know) that does weighting by country. No one has a data source that will truly represent the world accurately (percentage of traffic coming from a geographic region that is the same as the internet usage from that region), so it's an extremely important factor to appropriately report market share by continent or globally. A simple example is that China, by far, has the world's largest population and the world's largest base of internet users. While we have a vast amount of data coming in from China, we still have to factor it to more accurately represent actual internet usage. For more information about this, please read: http://www.netmarketshare.com/faq.aspx#Methodology