Year	% of GNI
1970	3.9
1971	3.1788153
1972	3.1788153
1973	3.5
1974	2.8
1975	2.9
1976	2.4560361
1977	2.4560361
1978	2.4560361
1979	2.3
1980	2.3
1981	2
1982	2.2
1983	2.1
1984	1.8
1985	2.2
1986	2.1
1987	2.1
1988	2.4
1989	2.6
1990	1.9
1991	2.1
1992	2
1993	2.5
1994	2.6
1995	2.4
1996	2.8
1997	2.8550669
1998	2.6
1999	2.52181818181818
2000	2.44363636363636
2001	2.36545454545456
2002	2.28727272727274
2003	2.20909090909092
2004	2.13090909090909
2005	2.05272727272727
2006	1.97454545454545
2007	1.89636363636365
2008	1.81818181818183
2009	1.74
2010	1.7
2011	1.68
2012	1.43
2013	1.29867806087484
2014	1.58570039503291
2015	1.84302852419592
2016	2.51202211780375
2017	2.29577460369932
2018	1.63568884113916
2019	1.63568884113916
2020	1.63568884113916
2021	1.63568884113916