Year % of GDP 1995 21.09202275372399 1996 20.64593951798693 1997 20.36184928298334 1998 21.2853887725806 1999 20.201499875765347 2000 18.424617379419438 2001 17.228498006520393 2002 15.518120311026404 2003 16.234278529708952 2004 14.10288373416955 2005 16.518816440491456 2006 17.106708945785186 2007 18.567864822805404 2008 17.95837650678181 2009 16.67393824952169 2010 15.891722946970374 2011 17.537650514629828 2012 16.93151079660131 2013 17.39417003452494 2014 18.089313424464525 2015 19.716784980130345 2016 19.249536583486446 2017 18.88634638066284 2018 19.51830916616271 2019 20.255840336125274 2020 21.15951098203683 2021 20.471551432370745 2022 19.616454636044384 2023 19.607101046820112