Year Percent of GDP 1980 19.03 1981 17.734 1982 18.243 1983 19.054 1984 20.009 1985 20.066 1986 19.943 1987 21.363 1988 23.595 1989 24.709 1990 23.198 1991 20.356 1992 19.219 1993 18.753 1994 18.792 1995 18.643 1996 18.851 1997 17.994 1998 18.656 1999 18.112 2000 18.627 2001 18.146 2002 17.954 2003 17.557 2004 17.296 2005 17.423 2006 17.743 2007 18.372 2008 17.18 2009 14.49 2010 15.795 2011 15.694 2012 15.872 2013 16.244 2014 17.259 2015 17.221 2016 17.263 2017 17.218 2018 17.191 2019 17.243 2020 17.183 2021 17.377 2022 17.545 2023 17.727 2024 17.921