Year	% of GNI
1990	2.53934284556125
1991	3.04207136680371
1992	2.89448942081829
1993	2.77616775718644
1994	2.46995101642623
1995	2.36867133821434
1996	2.31370424838393
1997	2.22418196038204
1998	2.21729301500833
1999	2.26776936887605
2000	2.12086608804526
2001	2.51528634585818
2002	3.0602022606688
2003	3.48601869914741
2004	4.05725846981114
2005	4.22426737513072
2006	3.87880842049299
2007	3.58861201937385
2008	3.10490078432229
2009	2.88370477690568
2010	2.66728882787385
2011	2.66929751963829
2012	2.45016410185952
2013	2.45993788889887
2014	2.47305638302717
2015	2.43102497234033
2016	2.53188648141044
2017	3.92080745916321
2018	3.98992208888323
2019	3.48169795265612
2020	3.04956970680007
2021	3.00877092849729