Year Percent of GDP 1980 23.843 1981 23.488 1982 24.969 1983 28.653 1984 30.336 1985 30.394 1986 34.678 1987 38.996 1988 41.181 1989 38.643 1990 38.612 1991 38.908 1992 37.656 1993 37.917 1994 37.487 1995 37.164 1996 35.591 1997 35.485 1998 38.48 1999 35.406 2000 34.754 2001 31.966 2002 31.607 2003 33.677 2004 35.946 2005 33.522 2006 32.908 2007 33.512 2008 33.193 2009 32.134 2010 34.577 2011 34.343 2012 34.991 2013 35.02 2014 35.16 2015 36.52 2016 36.174 2017 35.99 2018 34.901 2019 34.192 2020 33.746 2021 33.381 2022 33.199 2023 33 2024 32.713