Year % of GNI 2009 11.4119224106516 2010 20.3869257699835 2011 31.6051976998867 2012 33.0037883520801 2013 31.8970135267344 2014 29.1970017572753 2015 28.4582398251407 2016 22.1830537703572 2017 22.1702496999106 2018 22.5276296416703 2019 26.0917111769659