Year % of GNI 1995 22.197467037183277 1996 21.557419595765527 1997 21.597968266423074 1998 22.02432513748129 1999 20.684710596949646 2000 20.595534555658563 2001 20.364065665019773 2002 19.656650719491523 2003 19.138775151049888 2004 18.92693340000229 2005 19.750613993816312 2006 20.494678504218776 2007 21.30652214873412 2008 21.384716174873805 2009 20.275715593194548 2010 20.10380205209368 2011 21.050149307503215 2012 20.867608493239864 2013 21.94176898729676 2014 22.61805926933802 2015 23.62350740780083 2016 22.939619049263232 2017 22.985434260220025 2018 23.100961543994398 2019 23.431541275054116 2020 23.3611401957919 2021 23.151744516013125 2022 22.263498796699384 2023 22.55861492094577