Year Percent of GDP 1998 32.28 1999 30.72 2000 33.779 2001 34.477 2002 34.513 2003 33.97 2004 34.225 2005 37.078 2006 36.867 2007 37.551 2008 36.583 2009 32.728 2010 32.332 2011 34.715 2012 34.499 2013 33.537 2014 33.912 2015 31.882 2016 32.765 2017 33.272 2018 35.872 2019 34.032 2020 33.711 2021 33.443 2022 33.291 2023 33.246 2024 33.166