For added clarification, here's the top 20 programming languages as determined by RedMonk:
18. Visual Basic
The guys at RedMonk go on to say that the top languages rarely change that much. It's far more interesting to look at the turmoil happening in the lower rankings in the top 20. Over the past two years, many languages have dropped multiple ranks as other languages like Visual Basic 5 and ASP come into favor.
For comparison, the TIOBE Index is listing C as the most popular programming language in use at the moment. TIOBE bases their rankings off of the number of skilled engineers, courses and third party vendors that cater to a specific language.
Both rankings are a good idea of how the popularity of programming languages are evolving. RedMonk's rankings are far more interesting, however, because they look at the popularity on GitHub. A lot of the guys on there are hobbyist coders that may not influence the strict guidelines that determine the TIOBE Index.