Year % of GDP 1997 32.29893423853863 1998 29.479090274852553 1999 27.648233063755306 2000 26.717632894310796 2001 25.904611758240968 2002 29.202042472549756 2003 30.383872262783957 2004 29.465676952592368 2005 29.653740162065812 2006 32.54586662394757 2007 34.968275159332045 2008 35.094459991698024 2009 40.92889674505435 2010 41.764546727620136 2011 42.353221931966964 2012 43.670803059989865 2013 46.53741789220811 2014 47.256098527090764 2015 50.68611763288642 2016 53.050491482641874 2017 53.33422770015312 2018 52.94324504971761 2019 56.67568310989316 2020 61.61557247606123 2021 60.677235169813 2022 58.97664137581412 2023 58.78255773115247