I believe (but cannot prove) that the 20% is mostly due to China. Because it's such an incredibly populous nation, it can dominate international statistics like these.
Unfortunately my home nation (though very small) is also on something like 20% WinXP (thus limited to IE8). It's ridiculous, but as long as clients are willing to pay us to support IE8, then that's what we'll do, much as we hate it. In my country it hopefully won't be long before it becomes prohobitively expensive to support IE8, so there's that... :)
How long should the mountain wait for Muhammad, though?
In the UK, analogue terrestrial television was eventually turned off, and replaced by digital, following a lengthy publicity campaign.
I would guess there are very few people staring at blank TV screens and wondering what to do now. My point is, you need to give people a push sometimes.
Unfortunately my home nation (though very small) is also on something like 20% WinXP (thus limited to IE8). It's ridiculous, but as long as clients are willing to pay us to support IE8, then that's what we'll do, much as we hate it. In my country it hopefully won't be long before it becomes prohobitively expensive to support IE8, so there's that... :)