Year Percent of GDP 1980 39.047 1981 40.525 1982 39.087 1983 37.704 1984 37.885 1985 36.938 1986 40.847 1987 37.731 1988 39.295 1989 37.846 1990 34.411 1991 25.856 1992 22.803 1993 17.583 1994 11.542 1995 18.264 1996 16.542 1997 12.276 1998 18.659 1999 19.326 2000 19.191 2001 21.486 2002 20.665 2003 22.246 2004 23.604 2005 27.936 2006 32.314 2007 33.629 2008 36.974 2009 28.568 2010 22.568 2011 21.47 2012 21.942 2013 21.052 2014 21.544 2015 21.189 2016 19.144 2017 20.086 2018 19.238 2019 19.035 2020 18.743 2021 18.547 2022 18.606 2023 18.831 2024 19.313