Year Percent of GDP 1980 33.871 1981 32.835 1982 30.824 1983 27.615 1984 31.642 1985 30.669 1986 32.509 1987 36.452 1988 37.226 1989 37.927 1990 35.644 1991 33.646 1992 33.266 1993 35.217 1994 33.532 1995 31.36 1996 31.509 1997 29.45 1998 30.006 1999 30.659 2000 31.978 2001 31.626 2002 31.073 2003 33.166 2004 32.306 2005 32.941 2006 34.978 2007 34.417 2008 36.023 2009 31.731 2010 30.892 2011 29.701 2012 26.798 2013 25.549 2014 25.214 2015 24.859 2016 25.469 2017 26.7 2018 25.161 2019 24.492 2020 24.357 2021 24.023 2022 23.974 2023 23.809 2024 23.73