Year Percent of GDP 1997 28.892 1998 46.537 1999 58.959 2000 43.79 2001 36.69 2002 33.58 2003 29.38 2004 24.798 2005 17.741 2006 14.801 2007 12.267 2008 20.413 2009 35.425 2010 40.626 2011 36.876 2012 37.542 2013 40.519 2014 70.317 2015 79.503 2016 81.176 2017 71.915 2018 63.856 2019 62.029 2020 57.889 2021 53.825 2022 49.772 2023 46.244 2024 43.724