CNTS provides ranges of annual data from 1815 to the present for all countries for many variables of use to the social scientist researcher
Archive of data for individual countries. In establishing the archive, it was decided to assemble materials dating, insofar as possible, from 1815 (immediately after the Congress of Vienna and formation of the modern international system). It was also decided that all commonly recognized members of the international community would be represented, excluding a handful of quasi-states such as Andorra, Liechtenstein, Monaco, and Vatican City. In 1977, data for the latter were also introduced, with coverage extending from 1975.
The archive has almost 200 variables and contains data for over 200 country units, with provision for entries from 1815 (excluding the two modern wartime periods, 1914-1918 and 1940-1945). The basic structure of the archive is that of a rectangular matrix of periodically augmented records, each encompassing data for one country-year. The data is contained in the file and may be categorized in a variety of ways. First, all of the variables currently included in the file are longitudinal, rather than cross-sectional, in character.