Venezuela at #4?! Even on a per capita basis, this is very fascinating. That said, a number of countries seem to be missing. Also, looking at some other years,

Venezuela at #4?! Even on a per capita basis, this is very fascinating. That said, a number of countries seem to be missing. Also, looking at some other years, Austria in 1800s and 1950 are not the same country. I suspect same is true for many others. Still, very interesting data.