Year % of GNI 1990 13.981508072556 1991 13.8511416929043 1992 14.4079818027855 1993 13.56516276513 1994 13.3230234907708 1995 14.5939514533288 1996 14.7627167380227 1997 15.1392742260342 1998 14.808100961622 1999 15.0384541547771 2000 13.7820623099003 2001 13.5944015118995 2002 13.5618737739434 2003 13.5611852123518 2004 13.876328493987 2005 13.5491270319059 2006 13.6728037979958 2007 13.8633137914991 2008 14.0061916349791 2009 13.8361534398793 2010 14.5042872291795 2011 14.4864205618448 2012 14.7851187378325 2013 15.2246566907305 2014 14.8526958964945 2015 15.2102256966625 2016 15.2339479606859 2017 15.3575266912499 2018 15.5405981528577 2019 15.6926161045619 2020 16.6995204156031 2021 16.867037306689