Year	% of GNI
1996	15.0280557479879
1997	15.681702370429
1998	17.672723446052
1999	18.6478125612926
2000	18.9936098137592
2001	18.8383525403019
2002	19.3019508606698
2003	16.4994838634242
2004	13.8555470315105
2005	12.1078662213225
2006	11.8115407281499
2007	12.0901623905553
2008	7.42201016603123
2009	8.28925479767787
2010	17.317674936552
2011	17.9858865487903
2012	19.2132310311646
2013	18.8998309956181
2014	19.5372673519623
2015	15.3847569450526
2016	16.2850436323932
2017	17.210928305982
2018	18.4803426029682
2019	18.2520295619832
2020	19.8871574483186
2021	19.0361774796962