^Data show the ratio of the income or expenditure share of the richest group to that of the poorest. Human Development Report 2009, UNDP, accessed on July 30, 2011.
^Data show the ratio of the income or expenditure share of the richest group to that of the poorest. Human Development Report 2007/2008, UNDP, accessed on February 3, 2008.
^Data show the ratio of the household income or consumption share of the richest group to that of the poorest. Household income or consumption by percentage share (%), The World Factbook, CIA, updated on January 24, 2008. Note: To calculate the value given in the table for this article, the highest 10% value was divided by the lowest 10% value.
^Global Peace Index calculation incorporates UN Gini scores where available, so countries with a UN Gini calculation are left blank in this column. At [1] click on each country to see its Gini coefficient. Year is not given. "There are, nevertheless, some problems with the Gini-coefficient; there is a considerable lag in the publication of statistics for many countries suffers, forcing the Economist Intelligence Unit to estimate the coefficient for a sizeable proportion of the 153 countries in the GPI. These problems of measurement look likely to persist for the foreseeable future, and the use of other measures of income inequality may be more effective."
