TIOBE Index: How popular my programming language skill?

It is too bad for me which in last 8 years I'm too focus on specific skill.
I have been far away from my passion, programming. 
In recent day, i've done some research on the trend of programming language. Search and read many article over the net. and I found this, www.tiobe.com. TIOBE is company which specialized in assessing and tracking the quality of software.
What interesting to me  is, this company site, by monthly, release the rank of programming language popularity. It is officially call as  TIOBE Programming Community index. The ratings are based on the number of skilled engineers world-wide, courses and third party vendors. Popular search engines such as Google, Bing, Yahoo!, Wikipedia, Amazon, YouTube and Baidu are used to calculate the ratings. It is important to note that the TIOBE index is not about the best programming language or the language in which most lines of code have been written.
The definition of the TIOBE index can be found here.
Rating mainly defined base on the search engine. It mean, higher rank of programming language on that TIOBE Index, that programming language more demanding.
For university student, for instance, it can be used to decided which programming language that they should learn.
For educational institution, it can be used for planning their curricula.
Software house and vendor also can used what their programming language and technology that they are focused in the future. 
And so on.

But please note. 
There are many parameter for that above decision to make. You cannot simply use that Index.
You should take attention on old programming language which has good position on the index, Visual Basic (rank #9) and Delphi (rank #11).
With top 20 position for VB and Delphi, it is very interesting discussion, is history repeated?