r-cran-pwt 7.1.1-2 (amd64 binary) in ubuntu artful

 This package contains the Penn World Tables (PWT), which provide purchasing
 power parity (PPP) and national income accounts converted to international
 prices for most countries since 1950. The data are developed and maintained by
 scholars at the Center for International Comparisons of Production, Income and
 Prices (CIC) from the University of Pennsylvania.
 .
 The package contains all the releases of the PWT from version 5.6 to 7.1,
 which were created by the University of Pennsylvania. Note that more recent
 versions of the PWT have been created by the University of California, Davis
 and the University of Groningen, and are available in the r-cran-pwt8 package.