Year Percent of GDP 1980 31.406 1981 32.187 1982 32.408 1983 32.545 1984 31.85 1985 31.017 1986 30.998 1987 31.22 1988 30.42 1989 29.71 1990 29.958 1991 29.819 1992 30.851 1993 32.735 1994 33.385 1995 34.004 1996 34.463 1997 33.675 1998 39.274 1999 36.159 2000 36.554 2001 36.033 2002 36.434 2003 36.134 2004 34.764 2005 34.598 2006 34.077 2007 34.008 2008 34.963 2009 39.511 2010 38.549 2011 39.418 2012 39.374 2013 39.486 2014 38.889 2015 38.022 2016 37.947 2017 37.416 2018 37.066 2019 36.863 2020 36.755 2021 36.521 2022 36.444 2023 36.534 2024 36.78