## Methodology - Per Capita GDP at PPP
The average country has a per capita GDP of 9,537 US$ with a standard deviation of 14,972 US$. The lowest GDP is 93
US$ (Burundi), while the highest one is 101,654 US$ (Liechtenstein). ### For countries
__above__ the mean the points for the score-bar are calculated as follows:
With the calculated mean and standard deviation an assumed normal distribution has been calculated. The
probability of a value equals the points, i.e. a probability of 67% equals 67 points. ### For countries
__below__ the mean the points for the score-bar are calculated as follows:
As a GDP/capita of 0 US$ reflects the absolute minimum this value should be 0 points. The average GDP should equal
50 points. This means that for every 191 US$ a point is given. This method has been chosen as otherwise a country
with 0 US$ GDP would get about 26 points when applying the assumed normal distribution method. This would not
reflect the poor performance of the country in that area. ### Source
United Nations: last update 1 August 2006 |