Year Percent of GDP 1980 29.536 1981 29.216 1982 30.429 1983 23.314 1984 25.374 1985 22.967 1986 20.503 1987 22.842 1988 22.901 1989 20.799 1990 21.014 1991 22.074 1992 20.025 1993 18.683 1994 17.75 1995 18.055 1996 20.947 1997 21.742 1998 25.893 1999 23.597 2000 24.993 2001 22.933 2002 19.849 2003 21.307 2004 24.757 2005 29.476 2006 36.194 2007 30.033 2008 26.201 2009 15.005 2010 13.904 2011 15.485 2012 16.076 2013 15.4 2014 17.293 2015 19.551 2016 21.23 2017 22.122 2018 22.612 2019 22.775 2020 23.097 2021 23.104 2022 23.244 2023 23.384 2024 23.596