Year % of GNI 1995 12.7814999828805 1996 12.1452874946786 1997 13.842249983536 1998 15.8562663323389 1999 12.6792930341556 2000 18.3800414025898 2001 19.1046941024934 2002 20.1476531071277 2003 21.0310546641526 2004 21.1323315014149 2005 23.6119997323986 2006 19.6652839362671 2007 21.7258165231431 2008 23.4951868450316 2009 28.2861947400086 2010 21.9023703005139 2011 22.4263668274827 2012 23.9974422385434 2013 21.8249323679789 2014 22.1769954029302 2015 23.205659016468 2016 22.7132545936009 2017 23.2628908328929 2018 23.3360970958436 2019 22.7420287938417 2020 24.5657050437202 2021 21.9838690638958