Source: University of Pennsylvania
Release: Penn World Table 7.1
For more information and proper citation see http://www.rug.nl/research/ggdc/data/pwt/pwt-7.1
Source Indicator: cda2
University of Pennsylvania, Purchasing Power Parity Converted Domestic Absorption Per Capita, average GEKS-CPDW, at current prices for Tonga [PCDGDPTOA620NUPN], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/PCDGDPTOA620NUPN, May 22, 2018.