Year % of GNI 1993 18.0305392091849 1994 20.2084320973301 1995 15.332204237549 1996 16.2724337669081 1997 15.3997430747321 1998 13.9628497455902 1999 14.7114662815886 2000 17.2484893202862 2001 16.1216242931968 2002 15.9124087239217 2003 15.2335560269627 2004 14.9547168997558 2005 15.3106887573595 2006 15.7397309449782 2007 15.4844715619367 2008 15.4857964700795 2009 15.6993545362697 2010 15.8314290257671 2011 14.8427386422032 2012 13.9155799108756 2013 13.5290957633475 2014 13.6749402543301 2015 13.5719189321794 2016 11.8234422562572 2017 11.8160285386827 2018 11.7946541548002 2019 12.1160125235592 2020 11.7655408306534 2021 12.1082760778054