Year Percent of GDP 2000 36.909 2001 37.925 2002 37.838 2003 36.372 2004 37.962 2005 39.564 2006 39.804 2007 38.998 2008 38.454 2009 38.644 2010 38.67 2011 38.835 2012 39.225 2013 39.52 2014 39.339 2015 38.519 2016 37.414 2017 39.168 2018 38.186 2019 37.534 2020 37.312 2021 36.974 2022 37.1 2023 35.991 2024 35.991