Fair point. I do suppose it makes some sense, since otherwise the small ones would be barely visible slices, while they are more concentrated here.

That would be very interesting indeed.

I imagine that the drop observed between 2005 and 2020 isn't because people didn't listen to music, but likely rather piracy and digital media being harder to properly gauge (musicians selling music on their own websites and such, not having to burn it to CDs first).

This is also supported by various claims and statistics showing a fall in piracy in the late 20's.