Year Percent of GDP 1980 20.985 1981 18.769 1982 18.172 1983 17.325 1984 16.441 1985 14.388 1986 14.416 1987 16.192 1988 15.537 1989 12.857 1990 11.712 1991 12.269 1992 13.853 1993 17.846 1994 18.054 1995 16.892 1996 17.943 1997 18.989 1998 19.123 1999 16.029 2000 15.797 2001 14.046 2002 10.306 2003 13.284 2004 17.551 2005 18.888 2006 18.68 2007 20.099 2008 19.573 2009 16.053 2010 17.706 2011 18.398 2012 16.502 2013 17.306 2014 17.263 2015 17.071 2016 19.053 2017 18.757 2018 20.774 2019 16.969 2020 15.074 2021 15.192 2022 15.121 2023 14.938 2024 14.547