Year Percent of GDP 1980 49.254 1981 44.076 1982 42.741 1983 40.703 1984 45.337 1985 41.51 1986 36.287 1987 34.96 1988 36.508 1989 42.288 1990 36.641 1991 34.432 1992 38.193 1993 32.588 1994 33.05 1995 26.513 1996 24.177 1997 23.886 1998 18.896 1999 19.639 2000 20.32 2001 17.665 2002 20.266 2003 19.524 2004 21.965 2005 22.343 2006 24.504 2007 24.246 2008 28.79 2009 22.763 2010 23.716 2011 18.687 2012 15.951 2013 13.113 2014 12.21 2015 13.695 2016 16.564 2017 20.63 2018 18.968 2019 20.438 2020 20.901 2021 21.58 2022 21.969 2023 22.226 2024 22.495