Year Percent of GDP 2000 31.432 2001 32.277 2002 35.186 2003 37.882 2004 37.446 2005 36.542 2006 38.407 2007 40.897 2008 39.419 2009 45.167 2010 48.084 2011 45.561 2012 48.13 2013 51.674 2014 54.716 2015 57.098 2016 59.662 2017 58.223 2018 57.542 2019 57.363 2020 57.082 2021 57.255 2022 57.37 2023 57.429 2024 57.557