Year	% of GNI
1990	8.5727947156502
1991	17.907185535589
2005	26.8161621347302
2006	28.642446832018
2007	31.7563486892681
2008	32.322939444656
2009	26.8404940664153
2010	29.7047053820126
2011	27.367008301626
2012	28.5396552107685
2013	27.048079435274
2014	24.2689260646415
2015	20.3767639660177
2016	22.3100737029542
2017	21.8957750103684
2018	20.5855700722986
2019	18.5482921427742
2020	13.901686050324
2021	15.4049502767554