Year Percent of GDP 1980 20.476 1981 21.095 1982 24.336 1983 24.203 1984 24.863 1985 25.077 1986 26.077 1987 15.629 1988 15.184 1989 14.08 1990 12.348 1991 15.02 1992 16.354 1993 19.087 1994 15.743 1995 14.98 1996 13.696 1997 17.645 1998 34.054 1999 21.821 2000 15.371 2001 17.212 2002 19.005 2003 23.201 2004 27.902 2005 21.426 2006 27.152 2007 34.073 2008 36.478 2009 28.208 2010 26.128 2011 24.488 2012 24.39 2013 26.596 2014 20.311 2015 30.167 2016 29.343 2017 31.348 2018 31.5 2019 31.8 2020 32 2021 32.2 2022 32.3 2023 32.4 2024 32.4