Year	% of GNI
1977	31.072007686069
1978	22.51403230542169
1979	27.12085774278328
1980	30.040066373480478
1981	26.260080890397305
1982	17.240217133795973
1983	13.96822475080069
1984	11.229409575088411
1985	7.883334534818394
1986	3.4974543556913975
1987	6.059533559323276
1988	4.2351450635136825
1989	7.311627000091974
1992	14.05160169015956
1993	13.101346308264013
1994	11.987307002426808
1995	12.044403298311643
1996	14.432248479151344
1997	13.65845864546659
1998	9.975519961702734
1999	14.294045072863089
2000	17.955889990378335
2005	29.844488055082373
2006	32.010760529101375
2007	30.86497783835283
2008	33.31316135218251
2009	19.721256474549975
2010	25.647949549773458
2011	30.96776721281865
2012	29.733394033766448
2013	27.03390684499356
2014	23.433734821050535
2015	13.212667257610562
2016	13.119363393410799
2017	16.580472608361564
2018	20.876165162577884
2019	18.84342112621927
2020	10.874808059074585