SOURCE
CIA World Factbooks 18 December 2003 to 28 March 2011

DEFINITION
The percentage of total national household income held by the top 10 percent of households. Data on household income or consumption come from household surveys, the results adjusted for household size. Nations use different standards and procedures in collecting and adjusting the data. Surveys based on income will normally show a more unequal distribution than surveys based on consumption. The quality of surveys is improving with time, yet caution is still necessary in making inter-country comparisons.

DEFINITION: The percentage of total national household income held by the top 10 percent of households. Data on household income or consumption come from household surveys, the results adjusted for household size. Nations use different standards and procedures in collecting and adjusting the data. Surveys based on income will normally show a more unequal distribution than surveys based on consumption. The quality of surveys is improving with time, yet caution is still necessary in making inter-country comparisons.

SOURCE: CIA World Factbooks 18 December 2003 to 28 March 2011 via NationMaster