Year % of GNI 1996 12.335264126175746 1997 6.134468977768159 1998 3.9362834322570235 1999 7.386684842487698 2000 22.313858981903735 2001 12.738626355490117 2002 13.214659371345672 2003 15.905669034507943 2004 14.664012827246095 2005 18.88160634789383 2006 21.987407545481013 2007 18.503734507907215 2008 16.39760118481589 2009 20.56456904086632 2010 24.13575605562454 2011 26.34099329538393 2012 27.251348131764075 2013 28.040235846303574 2014 30.447956838625778 2015 29.611836391121216 2016 31.526914301621407 2017 33.20447088625826 2018 34.14858273900261 2019 33.37182001999142 2020 28.18419782559904 2021 30.43798486000312 2022 31.187841452624376 2023 25.97187467077631