Year % of GNI 1989 19.0578999139947 1990 13.3014121921575 1991 10.8730661150905 1992 14.3413678696728 1993 15.084908427883 1994 14.1817341053512 1995 13.7652340232904 1996 14.2011138648346 1997 18.1643602210722 1998 15.460237882967 1999 13.4679656661236 2000 13.2009503291873 2001 13.7476015208569 2002 13.0728978931892 2003 15.660420630651 2004 14.1689314438961 2005 14.3114562368554 2006 16.5224655577465 2007 15.4032828201897 2008 15.0622209618469 2009 14.8339550002003 2010 16.1605405019996 2011 18.2455304599847 2012 18.614262112974 2013 18.4319482737541 2014 18.335009323414 2015 18.0141887343481 2016 17.2178954632407 2017 17.1573720688417 2018 18.4044629300566 2019 20.0915377775035 2020 21.116578225939 2021 22.1521414694802