TIOBE programming languages ranking between 1985 and 2015

Here is a list of the most popular programming languages in the last 30 years, published by the tiobe.com website. Note that these are the average positions for a period of 12 months. TIOBE website suggests visitors to inform site managers if there is a shortage. In case you can notice that there is a suggestion, and you can contact them at tpci@tiobe.com.

References:
http://www.javacademia.com/2015/08/classement-tiobe-des-langages-de-programmation-1985-2015.html