Year	% of GNI
1977	20.613319092328123
1978	20.735556225222158
1979	21.129427896820484
1980	24.08734411480121
1981	21.68429890948323
1982	19.204357180260615
1983	19.058799492780587
1984	18.469318963098402
1986	17.765540398787312
1987	16.525040421848058
1988	16.850954978759017
1989	17.03346586524778
1990	14.917746735760774
1991	14.131498260650472
1992	15.963933376513264
1993	17.09767821666148
1994	17.77432974782062
1995	18.104066641398422
1996	17.72412881255781
1997	17.619006861811492
1998	16.513138515202563
1999	16.096468519913365
2000	17.514454910060298
2001	17.865954784481662
2002	20.223612765011747
2003	20.724518262345562
2004	20.874208391675282
2005	20.38122615967728
2006	20.948751340801376
2007	21.125119030102447
2009	17.404770454812464
2010	19.62462073244985
2011	19.81299265032544
2012	18.23300582641636
2013	17.962687543408403
2015	17.553322038095278
2016	18.005610163138943
2017	18.410899520654194
2018	18.568160634088457
2019	19.25489019553013
2020	19.563266470831824
2021	20.601825921561336