Statistics about HTML versions
There are various statistics on the web, about browser usage, OS usage etc.
Is there a statistics about HTML versions? Where we can see percentage of HTML 5, HTML 4.01, HTML 3.2 in certain month and see increasing number of documents in HTML 5?
I could find these links:
It doesn’t really matter which DOCTYPE you use, as long as you use one. All HTML versions are backwards compatible by design, so I’m not sure how this would be useful.
To answer your question though, you could use Blekko to grep the web for <!DOCTYPE html>: http://blekko.com/webgrep?page=view&id=596317f0c5088f34763e084129481a90
Powermapper claims to track this on their HTML Version Statistics page. As of Mar 2012, HTML5 is around 15%.
You probably have to derive that information from the browser usage. E.g. check which browser supports which html version and then search for browser usage by version.
http://www.netmarketshare.com/browser-market-share.aspx?qprid=1&qpcustomb=1 (Browser usage by version).