Year	% of GNI
1977	20.633134467667382
1978	20.759800628088783
1979	21.136810934158177
1980	24.097913260327914
1981	21.686756298939464
1982	19.19766701150053
1983	19.058728315112173
1984	18.48408686223505
1986	17.789031683953755
1987	16.554412031984743
1988	16.88194913363735
1989	17.055357633732342
1990	14.932309901732854
1991	14.143540040953246
1992	15.97398124559214
1993	17.107121523549264
1994	17.79259877323076
1995	18.113693813185318
1996	17.74980059430847
1997	17.628582380417754
1998	16.51990569335736
1999	16.120024453118507
2000	17.52364708955962
2001	17.871574907567158
2002	20.229763371091295
2003	20.724549876221083
2004	20.889540456143735
2005	20.399516971964413
2006	20.9536664213222
2007	21.12365156324637
2009	17.399216670062454
2010	19.6225482403047
2011	19.808949333923465
2012	18.238325188348984
2013	17.973738167466013
2015	17.54721180910123
2016	17.991373851462853
2017	18.396313094883002
2018	18.550499014331496
2019	19.24076274286571
2020	19.537197819229892
2021	20.56762922953406