Year	% of GNI
1970	29.0130735723612
1971	28.8532209847594
1972	29.1445115144297
1973	29.9358059397474
1974	29.1401397472196
1975	25.5462510268581
1976	25.9458213884179
1977	24.3306655137864
1978	22.9771925365256
1979	22.8541056607426
1980	22.9456228777246
1981	23.255358326575
1982	22.7333289593857
1983	23.1727593480601
1984	25.7869187710769
1985	24.1058779164176
1986	24.5761113627198
1987	24.1216060579674
1988	25.491393339791
1989	26.8371020698321
1990	25.9257022916407
1991	25.3305160652803
1992	24.7484407111403
1993	24.8672107884316
1994	25.6852507029012
1995	26.4996604952805
1996	27.0914881852138
1997	27.4906040973836
1998	26.1058744218988
1999	26.8648260115019
2000	27.189980076408
2001	25.8080024389561
2002	24.3277250073791
2003	24.8921486484864
2004	25.3211388087536
2005	25.8024093909018
2006	26.9376352043968
2007	27.3607768678021
2008	25.6617867768277
2009	24.1649394450181
2010	26.249521668895
2011	27.0131707910536
2012	26.2847684700894
2013	26.1804378455046
2014	26.6117868827714
2015	27.9630272627111
2016	28.2811383697437
2017	29.8580949340951
2018	30.391607170248
2019	29.6169936349031
2020	27.8125524406217
2021	29.2877471750257