Are your skills upto date?

I came across this website which rates the Programming languages, Interesting read!. Also helps in finding out if your skills are upto date:
http://www.tiobe.com/index.php/content/paperinfo/tpci/index.html
Abstract:

The TIOBE Programming Community index gives an indication of the popularity
of programming languages. The index is updated once a month. The ratings are
based on the number of skilled engineers world-wide, courses and third party
vendors. The popular search engines Google, MSN, Yahoo!, and YouTube are used to
calculate the ratings. Observe that the TIOBE index is not about the best
programming language or the language in which most lines of code have been
written.
The index can be used to check whether your programming skills are
still up to date or to make a strategic decision about what programming language
should be adopted when starting to build a new software system. The definition
of the TIOBE index can be found here.