Year Percent of GDP 1980 19.169 1981 18.943 1982 19.081 1983 18.232 1984 19.126 1985 20.602 1986 20.08 1987 21.871 1988 22.842 1989 23.71 1990 26.032 1991 21.8 1992 23.038 1993 22.189 1994 24.729 1995 25.274 1996 23.683 1997 25.572 1998 24.206 1999 26.634 2000 24.263 2001 24.244 2002 24.75 2003 26.831 2004 32.818 2005 34.65 2006 35.659 2007 38.114 2008 34.305 2009 36.48 2010 36.502 2011 39.59 2012 38.348 2013 34.024 2014 34.268 2015 32.117 2016 30.212 2017 30.941 2018 31.586 2019 31.744 2020 31.814 2021 31.989 2022 32.032 2023 32.125 2024 32.28