Year	% of GNI
1970	0.5038543398960089
1971	0.644590857213565
1972	0.7867443591766301
1973	1.2427550425751521
1974	1.493056879312379
1975	1.8497007931072398
1976	1.9629641441456132
1977	1.840749834558781
1978	1.618265996416071
1979	1.6929394970226879
1980	1.6110746571117338
1981	1.226914250400725
2009	0.2703654402418963
2010	0.3594540238480093
2011	0.386644007799435
2012	0.380988095588488
2013	0.3350905415127183
2014	0.3155709160675452
2015	0.29026098462459055
2016	0.36328208604662654
2017	0.3508791651862
2018	0.40105296171908
2019	0.37013082313839496
2020	0.24366838250991293
2021	0.33593493464695673