# Were there any significant data revisions of the component indicators for the 2019 HDI?

The major revision was made by the World Bank of GNI and GDP data in PPP terms (World Bank, May 2020.) Data collected in the 2017 International Comparison Program were used for computation of the PPP conversion factors with the new base year set at 2017. Also, the new population data from ‘The World Population Prospect, 2019 Revision’ (United Nations Population Division, June 2019) were used as denominator for computation of indicators expressed per capita and as averages, thus affected GNI per capita and education indicators.