Year	% of GNI
1977	22.499464863171493
1978	15.090261501859523
1981	8.96950027898576
1982	10.296051183824108
1983	12.044571374120814
1984	9.68314507477854
1985	6.821613072244709
1986	1.1569318390295802
1987	4.991448240235409
1988	0.836561164757871
1989	6.049644746146678
1991	23.50822834760943
1996	17.542134649201337
1998	13.031123342014851
2014	14.780866330477798
2015	8.406404395363632
2018	14.781138518592039
2019	13.57656661615567
2020	5.091287976194911
2021	8.801640946139148