Year Percent of GDP 1990 33.328 1991 37.701 1992 36.093 1993 34.729 1994 30.605 1995 31.258 1996 27.224 1997 25.164 1998 25.877 1999 27.978 2000 29.001 2001 29.48 2002 29.534 2003 26.17 2004 23.934 2005 38.549 2006 34.801 2007 34.66 2008 35.424 2009 36.944 2010 33.044 2011 29.941 2012 29.302 2013 27.311 2014 33.534 2015 33.874 2016 36.039 2017 29.629 2018 32.485 2019 30.819 2020 30.633 2021 30.455 2022 30.192 2023 29.94 2024 29.726