Year	% of GNI
1970	3.673737362350808
1971	3.589938298871927
1972	3.660520341961096
1973	3.627205880378955
1974	3.8932406664063435
1975	4.067478036666663
1976	4.069578425314474
1977	4.081881303092865
1978	4.101593876721473
1979	4.07753655555565
1980	4.12721175461253
1981	4.281771399277175
1982	4.32687645555695
1983	4.345824764775795
1984	4.35730364550324
1985	4.372708799562153
1986	4.3141718545276335
1987	4.360540286332481
1988	4.296420093146767
1989	4.100942538817919
1990	4.027663194097148
1991	4.05540577516003
1992	4.336019514776039
1993	4.610832077393579
1994	4.727993798113957
1995	4.67642609572024
1996	4.761537021857358
1997	4.860420056587822
1998	4.536358994835633
1999	4.501004520250415
2000	4.468198211984364
2001	4.567644514136737
2002	4.541660190480545
2003	4.6188058136120755
2004	4.590718668009509
2005	4.53725046836785
2006	4.531944130960345
2007	4.465667388411917
2008	4.590033091236772
2009	4.902787027427005
2010	4.8589470598797435
2011	4.760612788471062
2012	4.815009342413406
2013	4.756557824906966
2014	4.719744934100732
2015	4.692235264798305
2016	4.654099155914141
2017	4.630850444864326
2018	4.61575919346893
2019	4.596133504764137
2020	4.6086927622905876
2021	4.611556337297242