Year % of GDP 1995 51.26393901487136 1996 51.71039933338311 1997 52.78614757171659 1998 54.12733942236717 1999 55.34372625430577 2000 56.70530319145147 2001 56.6456333487036 2002 58.80956939032327 2003 60.01745254837692 2004 59.82471773131223 2005 60.06396500102997 2006 58.61804783276822 2007 62.30754336118892 2008 61.266021249720616 2009 65.04281433965653 2010 61.787444351396616 2011 61.08504996748826 2012 61.87494367357623 2013 62.79104628161453 2014 63.633959405142015 2015 64.38281691982337 2016 65.35193008461174 2017 65.40070448205846 2018 65.33128707549058 2019 65.96650908399798 2020 65.1821175960653 2021 64.70049055826702 2022 64.17278589183012 2023 64.6368312234664