Year	% of GNI
1990	2.3368945984843013
1991	2.692203581486481
1992	2.7092972339171766
1993	2.8423838024033192
1994	2.7015792685349145
1995	2.633949324249953
1996	2.5147815249557683
1997	2.5521022373321207
1998	2.714399223155002
1999	2.8468201302449176
2000	2.87937098382268
2001	3.1142028052337154
2002	3.3336108106371216
2003	3.385380619845662
2004	3.343141565866479
2005	3.2440822452170694
2006	3.118740538066803
2007	2.8463481214800788
2008	2.5420609507780667
2009	2.7118470366551795
2010	2.492069437614449
2011	2.364076592211211
2012	2.3862933586333557
2013	2.428437879787528
2014	2.4433524731047864
2015	2.587166185306587
2016	2.6621700485671353
2017	2.606836509082178
2018	2.6656594357960266
2019	2.7584969071238685
2020	2.8369197220261957
2021	2.6786819943371443