Year % of GNI 2000 2.72841679532079 2001 2.66117224138414 2002 2.62956591828565 2003 2.19763526382561 2004 2.06426072852001 2005 2.03905464909075 2006 1.93186980955778 2007 1.45244722163441 2008 1.56508508464519 2009 1.15989751221324 2010 1.79212498583792 2011 1.65384712613801 2012 1.74152529874826 2013 1.61162071034038 2014 1.60577828155797 2015 1.98053235090841 2016 1.74869008380181 2017 1.71368650128466 2018 1.75795133690986 2019 1.89184291446178 2020 1.86305945802336 2021 1.75913313935613