For that indicator, The World Bank provides data for South Korea from 2006 to 2012. The average value for South Korea during that period was 31.9 index points with a minimum of 31.6 index points in 2012 and a maximum of 32.3 index points in 2008.
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Definition: Gini index measures the extent to which the distribution of income (or, in some cases, consumption expenditure) among individuals or households within an economy deviates from a perfectly equal distribution. A Lorenz curve plots the cumulative percentages of total income received against the cumulative number of recipients, starting with the poorest individual or household. The Gini index measures the area between the Lorenz curve and a hypothetical line of absolute equality, expressed as a percentage of the maximum area under the line. Thus a Gini index of 0 represents perfect equality, while an index of 100 implies perfect inequality.