Year % of GNI 1990 32.9218878075466 1991 34.6292556867081 1992 30.1855625394945 1993 31.8578320337917 1994 19.9941641688794 1995 17.9572227348668 1996 28.1713293939998 1997 29.2912552132143 1998 31.4081787820895 1999 33.7591876170053 2000 33.9442607795758 2001 38.9794436964198 2002 28.1705231062438 2003 23.5511997487662 2004 21.8784064662173 2005 32.0192593593473 2006 28.0733866344421 2007 29.1488273092607 2008 23.7428038886108 2009 13.4189486528045 2010 20.0509500584367 2011 27.9177749061423 2012 25.1989532541499 2013 22.3631114116568 2014 26.0758361721575 2015 20.1621204681154 2016 17.8652482553707 2017 18.9866474187824 2018 13.7445515195656 2019 12.6824225730234 2020 8.93206894180754 2021 8.99521677939729