Year % of GDP 1995 51.7030718670816 1996 52.63821192717807 1997 52.25102325412924 1998 52.143406118923075 1999 52.966140799787176 2000 53.259511445917504 2001 54.36972601583251 2002 55.74307443922771 2003 55.65956548587453 2004 54.401851742811324 2005 55.280990464867266 2006 56.10949481275915 2007 55.82829595548859 2008 56.46015272545147 2009 56.87488556141796 2010 56.658429352958706 2011 55.99767988186501 2012 55.27088646953503 2013 55.48366110685053 2014 54.86956490725553 2015 54.08170400677954 2016 55.44805478637552 2017 55.88632413435429 2018 55.88362196626571 2019 56.41881423169314 2020 56.62920398310032 2021 56.99194657757035 2022 57.23795091035194 2023 57.55654349738029