Year % of GNI 1990 1.55728908870634 1991 1.44491139067719 1992 1.4640019837144 1993 1.47142140965678 1994 1.28429006142433 1995 1.37775723881033 1996 1.18041354567535 1997 1.221977768126 1998 1.1317550592363 1999 1.12184812951694 2000 1.09309829456986 2001 0.997932081634808 2002 0.962578330260273 2003 0.90216026139499 2004 0.861186562338871 2005 0.83902223830892 2006 0.776091351513229 2007 0.746260650601709 2008 0.697225287081695 2009 0.679450486829283 2010 0.657258989385849 2011 0.625517712511938 2012 0.622115573778129 2013 0.600358364983964 2014 0.525815222634978 2015 0.520141006804537 2016 0.537333307662377 2017 0.536209990160643 2018 0.538957049065477 2019 0.533575274316972 2020 0.579030460325459 2021 0.545872540753138