According to reports last month, C and Kotlin were the top contenders for TIOBEs 2017 award.
In August 2017, C had slipped to its lowest-ever rating (6.477 percent).
Since then, C has clawed back and climbed back up to 11.07 percent this month.
The C language gained 1.69 [percent] in 2017.
According to the TIOBE Programming Community Index, C was the most popular programming language from 2012 to 2015.
This is not something that can be developed in one years time.
source: www.techworm.net