pwt9 is a database with information on relative levels of income, output, inputs and productivity, covering 182 countries between 1950 and 2014. Released on: June 9, 2016
Source: Feenstra, Robert C., Robert Inklaar and Marcel P. Timmer (2015), "The Next Generation of the Penn World Table" American Economic Review, 105(10), 3150-3182, available for download at www.ggdc.net/pwt
Install it from github in R with:
devtools::install_github('amarjen/pwt9')