Year Percent of GDP 1993 22.71 1994 23.651 1995 23.549 1996 23.391 1997 23.288 1998 23.843 1999 26.243 2000 26.005 2001 27.219 2002 22.601 2003 22.721 2004 23.029 2005 24.425 2006 26.616 2007 29.545 2008 30.762 2009 34.524 2010 33.357 2011 34.901 2012 36.821 2013 37.602 2014 38.852 2015 41.366 2016 41.458 2017 41.174 2018 38.997 2019 37.475 2020 36.779 2021 36.269 2022 35.942 2023 35.286 2024 34.982