Year % of GNI 1995 15.0149015757669 1996 19.2479418377735 1997 16.2847660362389 1998 15.3600915928763 1999 14.1712088678246 2000 22.5769886078205 2001 26.0992975898785 2002 31.5156271286267 2003 30.0860426681793 2004 29.2611586263269 2005 31.5202924520393 2006 35.1176258876213 2007 33.5303300291031 2008 35.1959540801304 2009 32.962691771431 2010 34.9653401382829 2011 38.3096750093118 2012 34.4057740343986 2013 32.4347397726876 2014 33.5846111099799 2015 29.5022633615499 2016 26.497363324599 2017 29.100198957277 2018 31.6895877232871 2019 30.4914713767483 2020 28.7646690261501 2021 29.1150621370544