April 28, 2019 - Carolyn Egan
April 7, 2017 - Kevin Brice-Lall
February 10, 2016 - Panos Garganas, Athens
December 10, 2015 - Chantal Sundaram
October 6, 2014 - Evan Johnston
July 17, 2013 - Panos Garganas
November 17, 2012 - Dave Sewell and Siân Ruddick
January 12, 2012 - Baba Aye
November 20, 2011 - Jessica Squires and Benoit Renaud