I'm perpetually mystified how TIOBE is considered to be in any way reputable.
It's just searching for "$LANGUAGE programming" in various engines and applying magic fudge factors.
It's not an indicator of jobs, or activity, or much of anything else really. This is especially obvious with things like Visual Basic showing up weirdly close to the top, and having large spikes, as if there were times when VB suddenly got a huge influx in demand.
VB never even transitioned to 64 bits, it's that old. VB.NET i suppose exists but seems mostly pointless since it all compiles down to CIL anyway. Might as well use C#.