Year % of GNI 1991 9.91299817805276 1992 10.9525033821677 1993 10.5282791809902 1994 10.1061149654334 1995 9.89923529505841 1996 9.46162128625727 1997 9.51576349690683 1998 9.66125750056925 1999 10.0242130937456 2000 11.2489958996277 2001 14.181844728163 2002 16.0131424575159 2003 13.0810480198751 2004 11.5316568022656 2005 9.97776318428638 2006 10.5007875340736 2007 10.5774364617353 2008 10.9066505988467 2009 11.3962529150504 2010 12.4468840548583 2011 13.6053850035139 2012 14.4191930879561 2013 15.4680721645585 2014 17.4210322526942 2015 18.4870093949853 2016 18.6317292327834 2017 19.9374175843016 2018 19.1407960669127 2019 21.339602630986 2020 22.3097556854318 2021 23.2347834741848