Year % of GNI 1990 16.9396311151022 1991 12.6863288524991 1992 17.0097337755051 1993 14.5858994641712 1994 13.248500810984 1995 25.5942509447958 1996 31.1734481764161 1997 27.1960637786199 1998 25.9454042110577 1999 31.4976504625242 2000 29.9024021937704 2001 26.1466094331465 2002 29.4983848997589 2003 28.266871305799 2004 29.6771230799603 2005 27.0615929602598 2006 23.3781214553647 2007 24.8457340260632 2008 22.9028591439848 2009 20.5067214912433 2010 19.7310166069603 2011 16.7214061436981 2012 17.3925294014308 2013 16.8294218508015 2014 16.1657183063488 2015 15.6097406905994 2016 17.4883250705678 2017 13.0342789013817 2018 11.3123518724864 2019 17.1391020284373 2020 8.71588521384613 2021 4.95473147120007