Year Percent of GDP 1980 31.592 1981 31.794 1982 32.512 1983 30.259 1984 32.71 1985 33.336 1986 32.922 1987 32.828 1988 34.747 1989 35.227 1990 35.799 1991 33.919 1992 31.696 1993 32.393 1994 32.276 1995 31.252 1996 31.336 1997 33.401 1998 33.652 1999 34.271 2000 36.681 2001 33.039 2002 31.708 2003 35.706 2004 36.177 2005 37.441 2006 39.414 2007 34.315 2008 27.616 2009 33.565 2010 38.514 2011 34.53 2012 34.949 2013 34.108 2014 31.716 2015 34.292 2016 32.348 2017 30.638 2018 33.874 2019 33.154 2020 33.169 2021 33.312 2022 33.293 2023 33.343 2024 33.405