Year	% of GNI
1981	4.276559253675607
1986	4.349273522642729
1987	3.9248735978380007
1988	3.6700619313589846
1989	3.8092937101283364
1990	3.9585194523334737
1991	4.005845879292259
1992	4.255900089456931
1993	3.5233332210956343
1994	5.029856823067487
1995	7.203881302915586
1996	6.641143885269157
1997	5.796818878435958
1998	6.069568028658732
1999	3.9226580021112847
2000	3.4876564304261537
2001	3.53855315082315
2002	3.843913992800493
2003	5.47507926035398
2004	4.187823680070254
2005	3.7056401885078407
2006	3.2618682633319604
2007	4.0119446379461206
2008	4.0091605077649115
2009	3.7122597651055598
2010	3.02852035359321
2011	2.747839735510549
2012	2.8611195584342837
2013	2.8389815094623763
2014	3.0081789103348737
2015	3.181583827779661
2016	3.3182452968203644
2017	3.0313637821463697
2018	1.9558941509923509
2019	1.8459744799718592
2020	2.005634400244674
2021	1.9530689308122258