Year	% of GNI
1977	17.9377184620273
1978	11.3823445926767
1979	10.8924755622664
1980	17.5299800133245
1981	14.7575631570689
1982	21.524849657842
1983	23.3205795646992
1984	14.9200426439232
1985	18.4524049554883
1986	18.3188431124121
1987	18.7576527742385
1989	20.6971744471744
1990	20.1329680609381
1991	15.4046846011132
1992	19.9180544541369
1993	17.8016601430692
1994	17.1384635099635
1995	28.0758371921188
1996	32.3066401922558
1997	29.5312439318032
1998	28.3725051689945
1999	34.4005319521984
2000	33.2623134041559
2001	29.4480922978767
2002	32.802415111767
2003	31.7478179375911
2004	33.219205359677
2005	30.3969955755644
2006	27.1798376762067
2007	28.4135349493681
2008	26.7854314523076
2009	25.7387769386028
2010	24.0069324582237
2011	21.0622454738191
2012	21.4841814233371
2013	21.2202526945289
2014	21.0996243344291
2015	21.9718638051434
2016	23.2115329178995
2017	17.5380231043517
2018	16.0272368441244
2019	21.2178959041915
2020	12.1912632476242
2021	7.94487619090352