Year Percent of GDP 1980 33.994 1981 33.368 1982 33.845 1983 28.791 1984 26.775 1985 24.864 1986 22.614 1987 24.746 1988 33.271 1989 30.215 1990 27.413 1991 20.141 1992 17.298 1993 15.439 1994 15.76 1995 16.317 1996 15.754 1997 18.845 1998 20.285 1999 19.788 2000 18.596 2001 17.366 2002 19.908 2003 19.32 2004 19.194 2005 21.205 2006 23.104 2007 27.51 2008 28.487 2009 21.895 2010 21.298 2011 17.084 2012 16.027 2013 14.212 2014 13.643 2015 14.289 2016 15.04 2017 15.274 2018 16.656 2019 16.89 2020 17.382 2021 18.016 2022 18.671 2023 19.467 2024 20.236