Year	% of GNI
1981	34.556973142613316
1982	22.196532313685537
1983	17.43284350413383
1984	14.303880044819403
1986	8.097111307155442
1987	8.98301654270431
1988	8.755578902309265
1989	8.784323443381485
1991	-0.9274532800438458
2002	15.909850576659327
2003	20.20187877115017
2004	25.21743273593245
2005	32.65979024812731
2006	34.63741689713643
2007	33.42236865791101
2008	36.465459990660335
2009	21.805244963271832
2010	27.799091946046595
2011	33.474887261193246
2012	32.78088209242058
2013	29.779878503358926
2014	25.82138670078693
2015	14.575887907608442
2016	14.353493412994382
2017	18.478957832433963
2018	23.364909579359114
2019	20.849605165731365
2020	11.192214018984519