Year Percent of GDP 1981 16.051 1982 15.624 1983 13.238 1984 19.672 1985 19.464 1986 13.536 1987 13.021 1988 13.981 1989 11.588 1990 12.532 1991 15.578 1992 16.704 1993 16.564 1994 14.371 1995 15.244 1996 16.237 1997 19.632 1998 23.607 1999 18.772 2000 18.143 2001 14.268 2002 16.295 2003 13.232 2004 11.022 2005 14.254 2006 14.343 2007 15.809 2008 18.109 2009 17.747 2010 17.892 2011 21.039 2012 18.076 2013 19.565 2014 21.279 2015 20.487 2016 21.118 2017 22.059 2018 21.919 2019 20.752 2020 19.484 2021 18.255 2022 16.999 2023 16.144 2024 15.131