This is my annual chart showing the versions of CR that my newsletter subscribers were using when they signed up. It gives you a sense for which versions are being used and how quickly the new versions are catching on.  I have included numbers for 2014 even though the sample size is pretty small.

The slight jump in the version 10 is probably a fluke that will diminish as more data for the year accumulates.  You will see a similar change if you compare the bar for 2013 in this chart to the chart from last year.