Year % of GNI 1996 33.220803716046845 1997 33.28379519226886 1998 32.71884475059395 1999 31.139097448525245 2000 31.34200875077383 2001 30.626668372549794 2002 30.36516493054891 2003 31.247157246173927 2004 32.48952813846122 2005 33.01088390156039 2006 34.38080812505834 2007 35.96471330769347 2008 36.34046080234314 2009 35.32677293668485 2010 36.717394292847644 2011 36.363795459973005 2012 36.16914511091507 2013 36.78779255467226 2014 37.51932031233356 2015 37.5424660347194 2016 36.980766379243526 2017 37.73310620318962 2018 37.681341399553155 2019 37.18700577504924 2020 37.398916764913956 2021 39.34244099744623 2022 39.7079187661962