Year % of GDP 1975 49.32601031870561 1976 52.7644638846264 1977 32.261248791737316 1978 39.53759206817212 1979 56.69754902313664 1980 53.42970588747294 1981 54.66797414935165 1982 23.002753424156033 1983 25.44615793302497 1984 29.620668285612616 1985 22.372282546993343 1986 31.367701374046987 1987 20.39036628822941 1988 22.24067885788909 1989 37.57572019960478 1990 21.088931437545924 1991 -240.49496588204886 1992 -2.266881109600018 1993 10.436679904139861 1994 13.051535524468537 1995 18.44983793597558 1996 22.56846468422986 1997 26.144018043764756 1998 8.537289538482785 1999 16.630878544241984 2000 38.898784935470196 2001 23.85703527605792 2002 11.182907046762205 2003 19.685043409877405 2004 26.090530750655095 2005 37.21665564654224 2006 44.616942278798355 2007 36.05397605350661 2008 40.873562996881404 2009 27.340341482988606 2010 32.048553727916904 2011 42.940898117777394 2012 45.45999204165081 2013 39.8998364643537 2014 33.17907585082599 2015 7.491556309092716 2016 0.5865328436808277 2017 6.427481239874034 2018 17.40135595976095 2019 21.813746712607628 2020 20.49027588106121 2021 24.646638141276703 2022 34.50455545425916 2023 31.770693725944177