Year Percent of GDP 2000 39.667 2001 44.367 2002 41.327 2003 38.769 2004 34.909 2005 32.426 2006 34.524 2007 33.894 2008 34.583 2009 38.336 2010 36.246 2011 33.406 2012 34.441 2013 34.234 2014 33.285 2015 33.429 2016 35.079 2017 33.817 2018 34.827 2019 34.019 2020 34.101 2021 34.086 2022 34.204 2023 34.018 2024 33.741