Year % of GNI 1995 32.1482231051803 1996 31.4091782940739 1997 32.1325665115563 1998 32.8344672537716 1999 32.7534491476665 2000 35.4546225522422 2001 33.3481443623132 2002 32.0000912169426 2003 34.4085837119944 2004 34.8123051951028 2005 36.1350984150916 2006 38.1853500676397 2007 35.9847252305643 2008 31.1962399519742 2009 34.7014975269245 2010 38.0470640581894 2011 35.8223427952204 2012 36.366393372166 2013 35.7934297169992 2014 34.3567793195876 2015 35.3735176303101 2016 34.6885128075081 2017 33.1795274687702 2018 33.2112992682984 2019 33.0920969320951 2020 32.7215141790445 2021 36.010732613493