I'm just going to leave this here: http://langpop.com/
What's more, you'll never catch me making these silly statements about how Visual Forth ++ has surpassed ActionCobol 3.0 in April 2012 or things like that.
I stand by my results and think they're broadly accurate, but it's silly to make statements like they do - "Ruby drops out of top 10" - because there's just too much fuzz involved. I guess it makes sense for them because it gets them lots of traffic:-/
It's still way too Ruby heavy to be a good source of information.
However, since Ruby projects are overwhelmingly (almost exclusively) hosted on Github, excluding it suggests that Ruby is underrepresented.