Year Percent of GDP 1980 20.124 1981 17.014 1982 18.271 1983 18.364 1984 20.603 1985 22.1 1986 23.785 1987 22.022 1988 21.057 1989 21.323 1990 20.798 1991 19.612 1992 18.94 1993 17.378 1994 18.734 1995 20.686 1996 20.064 1997 22.062 1998 22.655 1999 20.888 2000 22.352 2001 21.825 2002 21.343 2003 20.922 2004 21.691 2005 22.206 2006 24.298 2007 25.278 2008 23.984 2009 19.088 2010 18.076 2011 19.127 2012 19.466 2013 19.691 2014 20.091 2015 20.631 2016 21.443 2017 21.611 2018 22.658 2019 22.99 2020 23.201 2021 23.397 2022 23.595 2023 23.753 2024 23.907