Year Percent of GDP 1980 27.121 1981 39.852 1982 41.023 1983 44.479 1984 46.845 1985 40.83 1986 40.314 1987 42.435 1988 40.026 1989 38.061 1990 41.016 1991 -8.026 1992 9.426 1993 23.388 1994 21.832 1995 21.481 1996 16.07 1997 10.2 1998 16.235 1999 17.803 2000 23.768 2001 28.703 2002 25.056 2003 26.156 2004 28.359 2005 27.784 2006 29.59 2007 23.837 2008 17.569 2009 16.654 2010 20.023 2011 20.254 2012 19.674 2013 16.692 2014 13.172 2015 15.761 2016 16.966 2017 17.43 2018 17.906 2019 17.88 2020 18.103 2021 17.731 2022 17.247 2023 16.727 2024 16.257