Year Percent of GDP 1980 14.682 1981 13.25 1982 12.827 1983 20.413 1984 19.625 1985 19.137 1986 19.762 1987 19.113 1988 20.104 1989 19.546 1990 17.704 1991 15.597 1992 15.494 1993 17.663 1994 18.956 1995 19.42 1996 18.343 1997 18.67 1998 18.193 1999 18.147 2000 19.314 2001 21.265 2002 21.003 2003 21.28 2004 20.295 2005 18.227 2006 17.225 2007 17.838 2008 15.696 2009 17.506 2010 25.205 2011 20.077 2012 17.428 2013 19.041 2014 19.433 2015 20.301 2016 21.148 2017 20.342 2018 20.057 2019 20.064 2020 20.338 2021 20.886 2022 21.076 2023 21.19 2024 21.321