Year Percent of GDP 1980 17.931 1981 14.505 1982 11.102 1983 10.805 1984 12.28 1985 13.89 1986 18.206 1987 18.803 1988 20.282 1989 18.416 1990 18.574 1991 19.502 1992 17.646 1993 16.748 1994 19.836 1995 19.63 1996 16.383 1997 14.644 1998 13.957 1999 12.874 2000 15.901 2001 15.118 2002 16.074 2003 17.851 2004 18.952 2005 19.139 2006 20.409 2007 19.699 2008 19.884 2009 19.489 2010 18.059 2011 19.298 2012 19.152 2013 19.214 2014 18.82 2015 17.449 2016 19.001 2017 19.043 2018 17.199 2019 18.124 2020 17.799 2021 18.419 2022 18.426 2023 18.58 2024 18.726