Year % of GNI 1988 8.246222407233308 1989 8.647882616769866 1990 8.927473008983403 1991 9.244351041560927 1992 20.962638085194953 1993 27.696062533060413 1994 33.50431541379469 1995 33.08779548079279 1996 34.92009102415265 1997 35.3467895624799 1998 48.00638396098842 1999 60.52616738696081 2000 52.237680840298076 2001 52.99519681648069 2002 49.30714118057766 2003 47.86094890081389 2004 41.399486557318504 2005 37.102413182939145 2006 39.35679774877581 2007 40.371979049513826 2008 35.553989127719994 2009 45.80575726371204 2010 40.61913127168034 2011 37.25587966890626 2012 37.639932413514074 2013 39.78005414844626 2014 39.66744864479263 2015 48.41498035767825 2016 53.07377250551052 2017 48.98673447187067 2018 45.943989007822275 2019 45.562494954428786 2020 50.18477551667674 2021 43.13078931186842 2022 35.83838987329041