Year	% of GNI
1970	5.186784962349
1971	1.98399468860806
1972	2.29468870378555
1973	3.14240544813914
1974	3.74435697201913
1990	6.98457988452298
1991	7.56261652212874
1992	8.36947269817454
1993	9.35209405805329
1994	12.0133460961662
1995	11.7675259938497
1996	11.9161680626876
1997	13.5489019226598
1998	14.6038107099027
1999	14.7684395115117
2000	13.7732716531552
2001	12.942096919317
2002	14.5100343770918
2003	14.3315119818934
2004	13.5782265514398
2005	10.9421669091914
2006	11.9477215781676
2007	11.6196160863976
2008	13.7464238827344
2009	15.3425824300955
2010	18.680572658574
2011	23.2394766741293
2012	25.4256987857018
2013	23.1366752472246
2014	22.6101481010798
2015	21.6176763431063
2016	19.8748517622301
2017	18.5032962960177
2018	16.423533200467
2019	19.1494652774963
2020	18.5140145143903
2021	17.5762638467941