Year	% of GNI
1977	32.353021795223164
1978	26.220286748163307
1981	23.028516950945072
1982	24.30462081539752
1983	25.678856283261197
1984	23.55783663772594
1985	21.124239020355656
1986	16.83468463133843
1987	20.298221684379087
1988	16.51410229651292
1989	21.122417478592507
1991	30.94130055535758
1996	30.186059599203436
1998	24.81090946889913
2014	25.790501972876566
2015	19.44988172121584
2018	26.55169152741899
2019	24.89434928694668
2020	15.922417887576696
2021	20.056202382010024