Year Percent of GDP 1980 29.271 1981 24.056 1982 19.379 1983 17.927 1984 18.523 1985 15.765 1986 14.769 1987 13.013 1988 14.925 1989 19.672 1990 17.027 1991 16.392 1992 20.041 1993 20.584 1994 19.755 1995 17.611 1996 17.772 1997 17.378 1998 19.939 1999 17.792 2000 18.321 2001 18.382 2002 15.143 2003 19.282 2004 25.186 2005 21.34 2006 21.421 2007 18.675 2008 17.901 2009 14.069 2010 14.043 2011 14.06 2012 13.442 2013 14.885 2014 14.73 2015 15.205 2016 16.117 2017 17.171 2018 17.105 2019 18.41 2020 19.111 2021 19.728 2022 19.715 2023 19.568 2024 19.097