”are these figures from StatCounter or made up for an example. ?”
Number of hits are from StatCounter FAQ: http://gs.statcounter.com/StatCounterGlobalStatsMay10_SampleSizeCountryBreakdown.csv
StatCounter methodology: We do not manipulate the data in any way. We do not collate it with any other information sources. No artificial weightings are used. We simply publish the data as we record it.
That is same as methodology from w3schools witch consist of they pageviews: These facts indicate that the browser figures above are not 100% realistic. Other web sites have statistics showing that Internet Explorer is a more popular browser.
I found article where someone try use Europe data from StatCounter and put together it with weight from InternetWorldStats. And the result? Different market share data as they publish.