Switzerland Import Treemap from MIT Harvard Economic Complexity Observatory, SITC4 categories
Economic Complexity Observatory, MIT Media Lab and the Center for International Development at Harvard University. (TC)  http://atlas.media.mit.edu
R. Haussmann, Cesar Hidalgo, et.al. Creative Commons Attribution - Share Alike 3.0 Unported license. See permission to share image on web at: http://atlas.media.mit.edu/about/permissions/