Year	% of GNI
1977	37.93677470093933
1978	30.514211338220505
1979	34.98102445428853
1980	39.54050758690997
1981	35.618808646534546
1982	28.100881793730803
1983	25.638897589857056
1984	23.65149380349704
1985	21.28455044801977
1986	17.881706509622035
1987	20.12311318949445
1988	18.29104866987242
1989	20.787982737729507
1991	12.8168663963715
1992	22.52790390912321
1993	23.895576915014118
1994	23.290773872250977
1995	24.640611506783618
1996	26.83482009482973
1997	25.864953462739095
1998	22.43843043574995
1999	26.160198969728558
2000	28.358135974937717
2005	39.99754334911403
2006	42.00469499436653
2007	40.89526667167891
2008	43.245770002547445
2009	30.50529442609087
2010	35.29969945748077
2011	40.15383211980786
2012	39.56790778460298
2013	37.06818804359423
2014	33.64779964502952
2015	24.522626085827643
2016	24.151988610898727
2017	27.582087186514258
2018	31.407223477150186
2019	29.423685523317918
2020	22.26527549761765