Year	% of GNI
1977	20.70911839
1978	22.36062214
1979	11.95263386
1980	8.512861205
1981	10.64641945
1982	14.14322655
1983	13.37100193
1984	13.89521667
1985	11.98036836
1986	9.30057898
1987	14.52687817
1988	18.49634841
1989	17.17410983
1990	16.75109491
1991	17.73268119
1992	5.162932333
1993	4.690584408
1994	5.670324804
1995	7.768338935
1996	6.718966347
1997	1.272214055
1998	13.11618373
1999	4.424703537
2000	9.720389184
2001	10.33224111
2002	5.53273323
2003	5.310456324
2004	4.641737204
2005	2.319146628
2006	7.573536794
2007	20.13080725
2008	14.43285872
2009	19.64164051
2010	18.69363735
2011	10.37953972
2012	2.223459485
2013	14.28886326
2014	12.966099
2015	7.921167466
2016	3.91963516
2017	10.50499518