Percentiles affected by errors in the estimation of interfractile average incomes, 1917–2011

Errors Number
90–95>95 221
95–99>99 1
99–99.5>99.5 14
99.5–99.9>99.9 5
99.9–99.99>99.99 3

Note: This table does not include errors reported in Table A2.

Source: Authors’ analysis of state-level tax data from Sommeiller (2006) extended to 2011 using state-level data from the Internal Revenue Service SOI Tax Stats (various years), and Piketty and Saez (2012)

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