Year % of GNI 1995 21.391262374314074 1996 20.784972168351175 1997 20.505937295484767 1998 21.42894185421766 1999 20.32131346992706 2000 18.501914373802585 2001 17.282897644425276 2002 15.56951300354649 2003 16.391469086848115 2004 14.561454595189144 2005 16.85174095437407 2006 17.561059872216493 2007 19.226298367688607 2008 18.341639239760134 2009 17.206838887639496 2010 16.436877014987797 2011 18.182858105946504 2012 17.60016332301838 2013 18.049768906759557 2014 18.806619418093025 2015 20.483401601584138 2016 20.026338567950415 2017 19.722277876848647 2018 20.377266249801167 2019 21.138882482463814 2020 21.994937196054394 2021 21.4431973567228 2022 20.420200022818275 2023 20.468044860756905