Victor Ongoma 12 Aug 2021
Professor Njuguna S. Ndung'u 11 Jun 2020
Mike Muller 11 Nov 2019
Meron Teferi Taye and Ellen Dyer 2 Sep 2019
Mark New 10 Oct 2018
Andrew Slaughter 27 Aug 2018
Esther Ndumi Ngumbi 22 Aug 2018
Shingirai Nangombe 12 Jun 2018
Mariola Acosta Francés, Edidah Lubega Ampaire and 16 May 2017
Munyaradzi Makoni 26 Sep 2016
Chris Arsenault 17 Jun 2015