Year Percent of GDP 1980 27.429 1981 23.792 1982 23.23 1983 21.646 1984 23.588 1985 23.641 1986 21.754 1987 22.406 1988 22.888 1989 22.411 1990 22.501 1991 22.247 1992 21.627 1993 18.921 1994 18.989 1995 19.813 1996 19.137 1997 19.269 1998 19.489 1999 20.005 2000 20.718 2001 20.67 2002 21.417 2003 21.065 2004 21.171 2005 21.103 2006 21.894 2007 22.185 2008 21.781 2009 19.393 2010 20.538 2011 20.462 2012 17.862 2013 16.955 2014 17.033 2015 17.303 2016 17.579 2017 17.65 2018 17.986 2019 17.731 2020 17.877 2021 17.975 2022 18.065 2023 18.209 2024 18.366