Year % of GDP 1993 25.698680203045686 1994 20.109104704097117 1995 20.86310881938667 1996 20.170507561027737 1997 23.02845023580405 1998 22.86669695411736 1999 22.8022718620624 2000 24.412144605750072 2001 21.71755991894347 2002 20.63571842086134 2003 22.877374050999872 2004 26.898870922831346 2005 27.955621433873652 2006 29.558257262164584 2007 29.134386485710433 2008 30.5020749698746 2009 26.04015024494814 2010 26.855278458201 2011 32.72210562059594 2012 31.23650361648942 2013 28.43710946586977 2014 27.469201597190334 2015 28.908471945167392 2016 26.403455255768886 2017 28.01690080190642 2018 29.158156213865272 2019 27.82262022080872 2020 27.469860285130345 2021 29.66284546939627 2022 26.562895563953955 2023 25.12331493880982