Year Percent of GDP 1980 21.434 1981 21.213 1982 19.394 1983 15.357 1984 14.483 1985 17.616 1986 17.547 1987 20.499 1988 20.907 1989 22.756 1990 18.542 1991 20.017 1992 19.162 1993 21.105 1994 22.722 1995 19.094 1996 17.255 1997 17.791 1998 18.205 1999 17.438 2000 19.002 2001 18.933 2002 17.58 2003 16.829 2004 17.928 2005 17.2 2006 17.824 2007 19.791 2008 21.659 2009 18.775 2010 21.857 2011 21.895 2012 21.503 2013 21.776 2014 20.566 2015 17.452 2016 14.972 2017 15.012 2018 15.404 2019 15.916 2020 16.465 2021 17.097 2022 17.699 2023 18.279 2024 18.851