Year Percent of GDP 1980 34.475 1981 33.175 1982 33.479 1983 35.733 1984 27.086 1985 19.121 1986 19.527 1987 21.433 1988 22.37 1989 26.466 1990 28.372 1991 23.95 1992 25.211 1993 28.408 1994 28.442 1995 26.579 1996 28.339 1997 29.308 1998 23.386 1999 18.958 2000 18.368 2001 22.141 2002 24.47 2003 22.98 2004 21.612 2005 21.55 2006 18.009 2007 17.337 2008 19.288 2009 16.592 2010 20.541 2011 20.466 2012 18.204 2013 20.016 2014 20.553 2015 21.214 2016 24.409 2017 25.132 2018 27.038 2019 27.137 2020 28.05 2021 27.917 2022 27.874 2023 27.858 2024 27.959