Year	% of GNI
1987	14.032366479388116
1988	13.24016985179397
1989	14.047261215406543
1990	11.623018930531124
1991	9.893786583527492
1996	16.143043811313895
1997	17.351660153644314
1998	18.69554057402986
2001	20.304791814578454
2002	22.676648537329275
2003	23.06661473863662
2004	25.09886824631613
2005	24.66545910463635
2006	26.849196671356317
2007	27.25234617756775
2008	27.968071824751043
2009	24.38379608788609
2010	27.02970271328094
2011	28.2057853760165
2012	28.84496170045225
2013	27.678368085735798
2014	28.088674146551142
2015	26.541183015321668
2016	27.56831174884725
2017	28.691858810762376
2018	28.72720644688564
2019	30.14112597891492
2020	29.80636736225229
2021	29.280415806996245