Year Percent of GDP 1980 45.034 1981 44.789 1982 46.281 1983 46.469 1984 46.954 1985 41.134 1986 36.587 1987 36.551 1988 33.448 1989 34.102 1990 35.64 1991 33.969 1992 35.492 1993 37.171 1994 32.865 1995 33.841 1996 35.022 1997 38.204 1998 31.569 1999 32.703 2000 34.899 2001 27.76 2002 25.48 2003 17.662 2004 23.123 2005 21.389 2006 22.349 2007 23.165 2008 30.534 2009 27.79 2010 28.238 2011 27.051 2012 29.852 2013 30.445 2014 30.084 2015 26.535 2016 27.012 2017 28.461 2018 26.998 2019 26.841 2020 26.895 2021 26.756 2022 26.792 2023 26.864 2024 26.877