Year % of GNI 1986 13.28415598673397 1987 13.061608266430285 1988 13.136968740383958 1989 13.433203000066882 1990 14.49208699927539 1991 14.158423612964876 1992 12.198540410992495 1993 12.659063125068641 1994 18.86584376767148 1995 17.311705312840026 1996 16.38208134685089 1997 16.897529280270966 1998 15.997276110696273 1999 15.100690721727458 2000 19.08642037594641 2001 17.38627106725577 2002 16.803401552856766 2003 18.56886266676154 2004 18.20306829168657 2005 12.294879606547259 2006 10.872396594539376 2007 11.101929535077138 2008 26.31538624938191 2009 20.831818679678065 2010 21.787135014427104 2011 22.41267272051842 2012 28.860197011267246 2013 19.08780367956192 2014 22.927172445806818 2015 18.443533231574282 2016 16.974928801679436 2017 18.386372188586776 2018 19.29979224682418 2019 21.686088013352276 2020 26.2179453774426 2021 31.190049856377613