Year	% of GNI
1970	3.2
1971	3.2
1972	3.1
1973	3.1
1974	3.3
1975	3.4
1976	3.2
1977	3.2
1978	3.5
1979	3.4
1980	3.6154847474026552
1981	3.9614839773239336
1982	3.8730393636162077
1983	4.331366149948617
1984	4.184124610949252
1985	4.07379556857783
1986	4.162699571445401
1987	4.045777760584634
1988	3.969562442558646
1989	3.5959853005682505
1990	4.403698189644572
1991	4.214524007971586
1992	4.371003909304393
1993	4.270933577120725
1994	4.657814351398153
1995	4.208850653333345
1996	4.910662984843611
1997	5.031873745105607
1998	4.156555045311789
1999	4.079655525589561
2000	4.215567019084739
2001	4.389439772412191
2002	4.4664479674416215
2003	4.607035552839463
2004	4.523588171446434
2005	4.523192561081585
2006	4.4693817519105545
2007	4.2437432487467746
2008	4.294779668069069
2009	4.470164001072492
2010	4.377906086644982
2011	4.246510726659617
2012	4.246652823671108
2013	4.217020673228351
2014	4.199380571349089
2015	4.429210639336052
2016	4.327346320348439
2017	3.988922357587052
2018	4.029516418661315
2019	4.154478470048384
2020	4.156523196262569
2021	4.155797974920338