Year Percent of GDP 1981 46.703 1982 24.987 1983 32.072 1984 29.028 1985 21.782 1986 22.231 1987 24.419 1988 23.975 1989 24.409 1990 22.776 1991 24.181 1992 25.253 1993 27.181 1994 26.767 1995 25.781 1996 26.048 1997 28.28 1998 29.973 1999 29.364 2000 29.314 2001 31.955 2002 33.293 2003 31.99 2004 32.345 2005 33.183 2006 30.863 2007 33.991 2008 36.453 2009 37.456 2010 33.139 2011 37.539 2012 36.86 2013 39.538 2014 43.761 2015 45.042 2016 40.043 2017 38.318 2018 38.819 2019 38.318 2020 37.472 2021 36.578 2022 35.575 2023 34.603 2024 33.603