Year	% of GNI
1977	20.63313446766739
1978	20.759800628088783
1979	21.13681093415817
1980	24.0979132603279
1981	21.686756298939468
1982	19.197667011500528
1983	19.05872831511217
1984	18.484086862235053
1986	17.78903168395376
1987	16.554412031984747
1988	16.881949133637352
1989	17.05535763373235
1990	14.93230990173285
1991	14.143540040953246
1992	15.973981245592148
1993	17.107121523549267
1994	17.792598773230754
1995	18.11369381318531
1996	17.749800594308468
1997	17.62858238041775
1998	16.51990569335736
1999	16.12002445311851
2000	17.52364708955962
2001	17.871574907567155
2002	20.229763371091288
2003	20.724549876221083
2004	20.889540456143735
2005	20.399516971964413
2006	20.9536664213222
2007	21.123651563246362
2009	17.399216670062458
2010	19.622548240304692
2011	19.808949333923465
2012	18.238325188348988
2013	17.97373816746601
2015	17.54721180910123
2016	17.991373851462843
2017	18.396313094883006
2018	18.550499014331507
2019	19.24076274286571
2020	19.537197819229895
2021	20.567629229534067