Year	% of GNI
1980	49.1969464792579
1981	48.3775420050302
1982	41.8410048524149
1983	39.998521785738
1984	34.0393481895686
1985	17.6876001611441
1986	9.69340955990525
1987	13.0095168437151
1988	23.0137400019716
1989	14.3676910974836
1990	25.2414824147992
1991	5.18508459127148
1992	1.8572830991065
1993	1.73223711997742
1994	6.74589823250093
1995	8.67814748633474
1996	8.95143535667482
1997	7.96517290800818
1998	-1.28417798407177
1999	-2.90713194030761
2000	16.9480824434151
2001	8.95512119251549
2002	14.7208911892427
2003	17.9598151889777
2004	17.3075965125752
2005	30.3466396088937
2006	36.8541640967947
2007	42.8367796864984
2008	40.1893490862353
2009	25.5851086498826
2010	27.1105422754295
2011	24.295795857283
2012	32.4368193738369
2013	29.3248139425259
2014	27.5096228928141
2015	17.5870476442706
2016	19.0117899292097
2017	22.8961464558426
2018	21.9679390061145