Year	% of GNI
1970	5.095426863863769
1971	6.27594541912886
1972	8.129991525014468
1973	10.52040912137442
1974	24.134278941559216
1975	17.5145360868603
1976	18.108712964228054
1977	17.19077455050225
1978	16.132209025881508
1979	26.30335405091129
1980	23.401053292054
1981	17.192456043212932
1982	9.922255397019399
1983	8.294970124247616
1984	8.021422010049871
1985	6.888721781360342
1986	3.580407342848943
1987	5.359833066155026
1988	4.493389049610302
1989	6.562127625279966
1990	7.23357645565703
1991	6.83584037469568
1992	6.630619745398131
1993	7.098477524294853
1994	6.916476628839398
1995	6.309908072387046
1996	7.191293127240164
1997	6.195801950296058
1998	4.250132125781881
1999	5.625375477931664
2000	8.360517523430367
2001	6.648460382224465
2002	6.284334510214768
2003	7.429112251294685
2004	8.931313504943057
2005	10.90032362611852
2006	11.055476276752355
2007	9.972839830650358
2008	11.458059248693978
2009	7.0577965002739695
2010	8.105040667246138
2011	10.297489715553622
2012	9.93169917315077
2013	9.371291550380317
2014	8.558576323491105
2015	5.180285395422769
2016	4.466441942430135
2017	5.395903619264996
2018	7.289661193555456
2019	6.193300085257746
2020	3.8469240201789674