Year Percent of GDP 1980 40.917 1981 28.855 1982 24.429 1983 24.98 1984 20.415 1985 19.771 1986 21.059 1987 23.526 1988 21.125 1989 21.052 1990 19.929 1991 19.135 1992 20.28 1993 21.57 1994 23.04 1995 24.589 1996 24.571 1997 24.111 1998 25.173 1999 23.56 2000 22.114 2001 20.49 2002 24.072 2003 24.293 2004 25.936 2005 29.493 2006 30.658 2007 27.897 2008 26.763 2009 29.436 2010 27.454 2011 32.546 2012 33.153 2013 41.888 2014 39.023 2015 36.31 2016 32.169 2017 29.334 2018 36.708 2019 31.196 2020 27.04 2021 24.558 2022 24.377 2023 24.227 2024 24.083