Year	% of GNI
1990	-19.5910302252197
1991	-15.0121370678216
1992	-22.5458058620464
1993	-15.955756122451
1994	-24.7966767301729
1995	-31.3872318063173
1996	-39.7597541451476
1997	-31.9603364567948
1998	-39.6980086760625
1999	-26.9627743859956
2000	-27.4801918458564
2001	-32.0932961696382
2002	-34.7641703835437
2003	-48.8001565872973
2004	-38.9658837469419
2005	-25.6643574469766
2006	-28.4872987099445
2007	-39.1250942843933
2008	-47.4143647418838
2009	-32.2585393421789
2010	-30.9485311219917
2011	-33.6331550294073
2012	-17.1652756839173
2013	-23.6755060082276
2014	-26.3434425823902
2015	-14.1332547153037
2016	-22.3487630627145
2017	-21.8040940328427
2018	-19.7605306576547