There are two standard methods of measuring the wealth of countries and how rich or poor its inhabitants are. The measure most often used is Gross Domestic Product (GDP), which represents the size of a country's economy. A refinement of this is per-capita GDP, which is a measure of the average welfare and affluence, or poverty, of residents of a country.A country with a GDP per capita of $765 dollars or less is defined as a low-income or poor country. The Democratic Republic of Congo has the lowest GDP per capita than any other country.

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