Year Percent of GDP 1997 57.342 1998 58.508 1999 61.913 2000 62.986 2001 66.629 2002 70.987 2003 71.543 2004 63.533 2005 55.225 2006 36.016 2007 22.026 2008 20.311 2009 19.194 2010 22.415 2011 23.4 2012 24.527 2013 27.766 2014 30.699 2015 34.274 2016 37.066 2017 39.722 2018 42.152 2019 44.81 2020 48.086 2021 49.606 2022 49.541 2023 48.433 2024 46.403