Year % of GNI 1995 12.24797918389 1996 17.4370903755494 1997 16.2679766166812 1998 17.5786290341664 1999 16.121582025417 2000 18.8453003288329 2001 19.3717298543786 2002 18.4308819815942 2003 19.3876962506672 2004 20.9251430002553 2005 19.9076693348989 2006 21.6472642689986 2007 21.455675239487 2008 20.3825204090481 2009 18.9736688740972 2010 19.2920262737926 2011 18.4836602831489 2012 16.9187188421714 2013 18.4158475414971 2014 19.2278354055352 2015 23.452118986649 2016 23.3082562268919 2017 25.1462085460515 2018 24.9849927317524 2019 25.6497838939591 2020 23.0625480118133 2021 24.6206021450804