Is there any open data of amount of Kotlin code on Github

I’m going to do a small presentation of Kotlin for my team and tried to find graphics of lines of Kotlin code on GitHub like shown here: Dmitry Jemerov - Kotlin: Making JVM Development Fun Again (Ru) - YouTube

Is it published anywhere?

At this time the raw data used for this chart isn’t published anywhere. You can use GitHub Archive and BigQuery to collect your own data.