Year	% of GNI
1977	37.77439790726635
1978	31.853120953264057
1979	38.147266058978545
1980	44.70408186808343
1981	41.529644187959526
1982	31.769406006692197
1983	28.17173701581414
1984	25.80149033173349
1985	22.32188346615978
1986	19.696230369573115
1987	20.56191331964521
1988	20.248100311109276
1989	19.99571847091454
1991	9.515427985798308
1992	20.430237024422592
1993	18.999460985193526
1994	19.137607952608896
1995	20.757600837452472
1996	22.51979903949343
1997	22.0555362160457
1998	19.293936696581163
1999	23.08989825563265
2002	25.653152272193
2003	29.894371188299125
2004	35.19136124751094
2005	42.41659198321948
2006	44.14404595234146
2007	43.077114574665686
2008	45.48657929062936
2009	31.582382635613712
2010	36.87603966507411
2011	42.077301671492464
2012	41.05435140407257
2013	38.25468423509471
2014	33.89446901963108
2015	23.57407984564046
2016	23.239841214429962
2017	27.781161609937687
2018	31.912180934345287
2019	29.475465855777294
2020	22.25879906736699
2021	28.346525506354194