Year % of GDP 2001 66.2992287435371 2002 64.1329244858025 2003 62.5308943592501 2004 61.8425933319116 2005 63.5977700769197 2006 65.8336190975591 2007 68.4438486940037 2008 62.7583028636525 2009 58.67877651579 2010 56.801493418105 2011 55.420969561755 2012 54.7386972787187 2013 56.4080635308491 2014 57.8900966815905 2015 60.6328656443199 2016 63.3767301509724 2017 65.0960419961708 2018 68.0857418354669 2019 69.4713879653929 2020 76.6568983217787 2021 74.457368521745 2022 73.536796365734 2023 71.3728040192995