Year % of GNI 1990 10.0162314415795 1991 10.5613964579656 1992 10.420349312392 1993 10.9356568518472 1994 11.6940475788444 1995 12.8089737325278 1996 12.5244428149458 1997 10.9771114240178 1998 12.9102516762225 1999 17.6706952301403 2000 18.2058533366261 2001 15.6193547403661 2002 14.6580644873033 2003 14.0035860952307 2004 10.5485475926522 2005 8.07094292689281 2006 7.0309175778574 2007 5.658584847099 2008 4.53263258536234 2009 6.05406889190302 2010 5.65262760937672 2011 5.2492888403384 2012 4.76725206732431 2013 4.65413313137482 2014 6.06510515861557 2015 7.00601953965949 2016 7.67769454961728 2017 5.75612756626461 2018 5.50249682244574 2019 4.57350849501398 2020 4.24071252864791 2021 3.67293612668515