Year Percent of GDP 2001 37.095 2002 42.56 2003 50.715 2004 51.746 2005 39.162 2006 29.943 2007 35.703 2008 54.219 2009 38.926 2010 55.894 2011 44.646 2012 35.596 2013 28.242 2014 25.16 2015 32.268 2016 27.531 2017 26.882 2018 21.206 2019 20.701 2020 20.916 2021 20.494 2022 20.413 2023 21.088 2024 21.16