Top 10 Richest Country in the world 2015-2016 (GDP ,PPP)

There are two standard methods of defining the richest countries in the world. One takes into account the economies that are the largest, as measured by total gross domestic product (GDP). However, the most commonly accepted definition of the wealthiest countries is to determine how rich the average resident of a country is. For this reason, the best method is to use GDP data per capita. Moreover, using a PPP (purchasing power parity) basis is arguably more useful when comparing generalized differences in living standards on the whole between nations. This is because PPP takes into account the relative cost of living and the inflation rates of the countries, rather than using just exchange rates, which may distort the real differences in income. This is the measure most economists prefer when looking at per-capita wealth and when comparing economic strength between countries and living conditions or use of resources across countries.