Year Percent of GDP 1995 48.152 1996 53.087 1997 48.418 1998 45.564 1999 47.858 2000 52.022 2001 44.403 2002 45.139 2003 39.905 2004 37.816 2005 39.776 2006 38.762 2007 36.339 2008 36.936 2009 44.084 2010 42.145 2011 40.817 2012 40.63 2013 41.441 2014 42.035 2015 45.09 2016 41.451 2017 40.192 2018 39.988 2019 39.211 2020 38.958 2021 38.264 2022 38.136 2023 38.237 2024 37.217