Year Percent of GDP 1998 34.778 1999 36.494 2000 37.392 2001 36.757 2002 35.347 2003 36.041 2004 34.877 2005 34.301 2006 32.739 2007 33.13 2008 33.494 2009 33.862 2010 34.608 2011 32.099 2012 32.758 2013 35.638 2014 37.254 2015 37.749 2016 33.149 2017 32.548 2018 35.078 2019 37.058 2020 35.753 2021 35.348 2022 35.499 2023 35.533 2024 34.645