TIOBE's methodology is pretty controversial[0], I wouldn't read anything into changes as small as this.
[0] http://blog.timbunce.org/2009/05/17/tiobe-index-is-being-gam...
[0] http://blog.timbunce.org/2009/05/17/tiobe-index-is-being-gam...
Another option is to consult the download page for free pascal compiler (this is one of the mirrors)
https://sourceforge.net/projects/freepascal/files/stats/time...
Also lazarus ide download stats https://sourceforge.net/projects/lazarus/files/stats/timelin...