This publication was developed by the Policy Analysis and Innovation Section of OCHA’s Policy Development and Studies Branch. Managing Editor: Lilian Barajas Researcher: Brittany Card Design and layout: Broadley Design OCHA wishes to thank data-source organizations and acknowledge the contributions of staff and partners in preparing and reviewing this document. For more information, please contact: Policy Development and Studies Branch (PDSB) United Nations Office for the Coordination of Humanitarian Affairs (OCHA) E-mail: ochapolicy@un.org Š 2015 United Nations ISBN: 978-92-1-132041-1 eISBN 978-92-1-057127-2