Year Percent of GDP 1980 24.112 1981 21.159 1982 19.727 1983 18.322 1984 15.444 1985 15.036 1986 16.812 1987 19.454 1988 19.757 1989 21.812 1990 20.833 1991 16.648 1992 18.791 1993 19.758 1994 21.004 1995 20.05 1996 20.054 1997 22.101 1998 28.069 1999 27.113 2000 27.893 2001 26.771 2002 26.957 2003 19.409 2004 20.627 2005 24.773 2006 26.927 2007 28.351 2008 30.024 2009 23.573 2010 26.38 2011 25.026 2012 24.296 2013 22.724 2014 23.025 2015 22.577 2016 21.944 2017 21.831 2018 24.577 2019 24.571 2020 24.391 2021 24.508 2022 24.669 2023 24.899 2024 25.072