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

Errors Number
P90–P95>P95 221
P95–P99>P99 1
P99–99.5>P99.5 14
P99.5–99.9>P99.9 5
P99.9–99.99>P99.99 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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