I also think it's a bit misleading, mainly because of China and India (more than a third of world population) being ignored that way.

I would love to see diagrams with abstentions and also adjusted for population and maybe GDP.

Curiosity. I treat life like a videogame. It may not be the most interesting one and has lots of dumb phases, but it can be fun to discover new things, abuse the mechanics and you are constantly challenged by massive amounts of new DLCs.