Year	% of GNI
1987	15.223098823916835
1988	14.398884291124288
1989	15.017974710718402
1990	14.221975491547608
1991	12.842175359140656
1996	19.82235047550686
1997	21.244462456592707
1998	19.905463801225977
2002	24.650966832758762
2003	25.019182455440706
2004	27.422090452543035
2005	26.87251442088458
2006	27.96469828131366
2007	28.466410681210057
2008	28.214351986326005
2009	23.93715508896275
2010	27.563189920510847
2011	27.4084600095214
2012	26.652730166891352
2013	25.096169969395483
2014	25.06184453733406
2015	22.637634844418475
2016	25.228357161015552
2017	27.34439095696199
2018	27.723667125567225
2019	29.05273274615641
2020	28.473717374732285
2021	29.107038215693027
2022	28.39760135535903