Year Percent of GDP 1980 20.003 1981 18.484 1982 18.874 1983 18.466 1984 17.951 1985 17.966 1986 18.516 1987 18.965 1988 17.849 1989 18.788 1990 18.935 1991 19.026 1992 20.237 1993 20.821 1994 19.546 1995 18.546 1996 18.997 1997 17.919 1998 17.711 1999 15.565 2000 17.227 2001 16.996 2002 16.583 2003 16.758 2004 16.578 2005 19.081 2006 19.332 2007 18.787 2008 19.206 2009 17.549 2010 15.805 2011 14.121 2012 15.076 2013 14.957 2014 14.635 2015 15.707 2016 15.686 2017 16.094 2018 16.424 2019 15.4 2020 14.6 2021 14.325 2022 13.861 2023 13.5 2024 13.3