The GDPs of all countries are from Summers, Robert and Heston, Alan, “A different Set of Global Comparisons of Actual Products and Price tag Degree Estimates for one hundred thirty Nations around the world, 1950–1985,” Overview of Revenue and Wealth 34 (03 1988), pp. 1–26CrossRefGoogle Scholar. These estimates are https://davyy704mcd2.webbuzzfeed.com/profile