Year % of GDP 2001 69.82409232599161 2002 70.34500060976995 2003 71.53962587785742 2004 73.19976038022585 2005 75.74411963555137 2006 73.36163829390877 2007 72.19437600041962 2008 68.39651988104272 2009 65.49480253564722 2010 64.57936807838503 2011 68.87670102243536 2012 70.72055164405656 2013 70.96541387614687 2014 72.53794557330832 2015 74.022423308339 2016 79.46845933651868 2017 81.02526836152407 2018 81.98182124603383 2019 83.81406129649159 2020 75.12468694825426 2021 75.45507720686315 2022 79.0099165915336