How many IE6 users are real users?

internet-explorer, internet-explorer-6, user-agent

Solution

At last count on W3Schools, IE6 users made up slightly less than 10% of the global web population. (As the commenters rightly point out, these statistics are based on visitors to a web development site, so you can expect it to be somewhat biased, although the numbers for IE6 here are very similar to the other sites.)

In the US, IE6 users make up about 6% of the traffic.

Here is one more site that tracks browser usage across thirty thousand or so sites. IE6 is currently used by slightly less than 10% of internet users on these sites.

Problem

I'm supporting an existing website and IE6 suppport seems to come up given the amount of rich AJAX and other technology sprinkled into the solution. IE6 is definitely going the way of the dinosaur, however the people who operate the site insist that 20% of Internet users are still rolling with IE6. My question is this: how many of the 20% are real domestic US IE6 users? A great number of these people hitting with IE6 strike me as being out of country running illegal installs of Windows XP ineligible for Windows Update. I say this because I've travelled the world quite a bit and used cafes all around where this is the case. Do anyone have any real hard numbers for recent domestic US IE6 numbers? Regards.

Original source