Year Percent of GDP 1980 30.299 1981 30.81 1982 29.707 1983 28.856 1984 29.725 1985 31.367 1986 31.643 1987 31.297 1988 32.511 1989 33.34 1990 33.439 1991 33.538 1992 32.98 1993 31.997 1994 30.384 1995 29.548 1996 32.291 1997 32.106 1998 31.369 1999 29.623 2000 29.98 2001 28.563 2002 27.307 2003 27.533 2004 28.129 2005 28.327 2006 28.601 2007 29.182 2008 27.378 2009 24.1 2010 25.174 2011 24.212 2012 23.617 2013 24.082 2014 24.675 2015 27.131 2016 27.363 2017 27.939 2018 27.934 2019 28.374 2020 28.623 2021 28.452 2022 28.506 2023 28.582 2024 28.677