Year	% of GNI
1997	18.4715443073519
1998	16.6078462200864
1999	18.6741113110495
2000	16.7845332346362
2001	20.5920004562194
2002	19.409271680575
2003	18.526686883166
2004	15.5497715773653
2005	14.3894169629406
2006	14.0535458187918
2007	15.0179619102885
2008	14.6356214684417
2009	14.8405638876703
2010	14.0912009596044
2011	15.1454893070221
2012	14.8398934663125
2013	13.6556593329526
2014	13.5605339026454
2015	13.4577883903428
2016	13.7033043503186
2017	14.1018684050065
2018	14.1406753108336
2019	14.8530019191662
2020	15.0329221367635
2021	15.6163822542941