Year	% of GNI
1970	4.69685761643881
1971	3.99511010371867
1972	3.57826695154972
1973	5.20135247924472
1974	6.62514055090902
1975	5.86596679878678
1976	4.75002900599609
1977	14.2801143700247
1978	13.2355148480025
1979	12.1099504962734
1980	15.3597659557602
1981	12.0867583079485
1982	16.2192579348422
1983	11.4465552216447
1984	10.4174589702477
1985	6.70697958344789
1986	10.4325435115054
1987	9.17575482987565
1988	10.0777931731455
1989	9.92870441603954
1990	14.8125390264749
2013	17.9381786112911
2014	18.4044497444262
2015	18.9802003702649
2016	19.6531270823113
2017	18.8064438463011
2018	11.8044951295007
2019	10.7897942800483
2020	11.5189341632984
2021	11.2979192936073