Year % of GNI 1990 2.32096876672272 1991 2.07856988237495 1992 5.10030576127487 1993 4.64457978445172 1994 5.78623089284368 1995 2.41966632272803 1996 2.24208728645379 1997 1.79700580964319 1998 1.83165033362569 1999 2.08936651370406 2000 1.98160127056485 2001 1.87334491360907 2002 1.53810825746231 2003 1.49464036296395 2004 1.40666616997259 2005 1.21682532135402 2006 1.11636419506255 2007 0.995963987223355 2008 0.964214355100531 2009 0.984049695772854 2010 1.01016408273256 2011 0.990881258253687 2012 0.919081228090842 2013 0.858393546159086 2014 0.75445866464858 2015 0.736354751025435 2016 0.740349743499013 2017 0.726864545451603 2018 0.725903722308709 2019 0.720941911594837 2020 0.698844581516494 2021 0.638020882990015