Year % of GNI 1986 3.8145616842999552 1987 3.578784800426329 1988 3.5862067660903287 1989 3.7872177835227943 1990 4.884963079838333 1991 4.665373916619468 1992 4.588747953909457 1993 4.579086429210432 1994 8.180737150567076 1995 8.147002035095356 1996 6.794879224821071 1997 5.9327290010969165 1998 5.812316690870229 1999 4.266749458043665 2000 4.719055099617272 2001 4.572119636342109 2002 5.054710435571427 2003 6.485183946620592 2004 5.7783253938184505 2005 6.129773542693035 2006 6.140900207805018 2007 6.423328317598875 2008 6.449625716687773 2009 5.085180973527646 2010 5.07614168636283 2011 7.1151299206858845 2012 5.240757055994947 2013 4.6994933348816526 2014 4.55420193240441 2015 3.920447568317275 2016 3.851802774124089 2017 3.7049071175567416 2018 3.0234591851798074 2019 2.6852232437655847 2020 2.898571006499939 2021 4.797101549172936