Year % of GNI 1990 4.8086566019688375 1991 4.7212731031750765 1992 3.8743851116756876 1993 3.713241996316954 1994 3.563147545757835 1995 3.356383376322342 1996 3.132717150116252 1997 2.971076781715068 1998 2.8332543617232555 1999 2.7241770994753747 2000 2.5077787556146838 2001 2.4306306972279783 2002 2.3526322748036606 2003 2.257897251850316 2004 2.1611102663791284 2005 2.085971500707322 2006 1.9740370896949901 2007 1.8912634508999577 2008 1.77261016274494 2009 1.6887011972952375 2010 1.566830629444788 2011 1.5470805143968502 2012 1.50182653954397 2013 1.4956677932980826 2014 1.393351023649709 2015 1.3366723115744563 2016 1.228100180019232 2017 1.1635822664904014 2018 1.1074180473393596 2019 1.0533867530330854 2020 1.0472780391392416 2021 0.9959786774334058