http://www.sankey-diagrams.com/wp-content/gallery/x_sankey_213/dynamic/gea_report_embodied_trade_sankey.PNG-nggid041005-ngg0dyn-500x0x100-00f0w010c010r110f110r010t010.PNG
The 2012 GEA Global Energy Assessment report (GEA Global Energy Assessment – Toward a Sustainable Future, Cambridge University Press, Cambridge UK and New York, NY, USA and the International Institute for Applied Systems Analysis, Laxenburg, Austria) features five maps showing energy trade in the world on pages 128/129.
Via - Sankey Diagrams