Year Percent of GDP 1995 40.496 1996 38.761 1997 38.77 1998 37.899 1999 38.231 2000 37.39 2001 37.719 2002 38.456 2003 42.461 2004 40.174 2005 39.282 2006 39.185 2007 39.721 2008 38.657 2009 38.75 2010 39.325 2011 40.31 2012 40.55 2013 41.355 2014 40.335 2015 41.091 2016 40.209 2017 40.503 2018 42.053 2019 42.224 2020 42.124 2021 42.101 2022 42.105 2023 42.11 2024 42.128