>The figures in this interactive feature refer to the total number (or cumulative “stocks”) of migrants living around the world as of 1990, 2000, 2010 or 2017 rather than to the annual rate of migration (or current “flows”) in a given year. Since migrants have both an origin and a destination, international migrants can be viewed from two directions – as an emigrant (leaving an origin country) or as an immigrant (entering a destination country).
http://www.pewglobal.org/2018/02/28/global-migrant-stocks/