Year % of GDP 1977 17.09388299423655 1978 15.428589995331604 1979 16.952260135494004 1980 21.070629851712333 1981 21.3636136740019 1982 24.28769018790226 1983 26.49863761101272 1984 29.311489645830697 1985 33.524070595606034 1992 65.76275773526768 1993 58.01017353359042 1994 52.061018582042664 1995 49.113874581573235 1996 41.663949471155114 1997 41.79470217804052 1998 43.99811846448856 1999 46.79347474927877 2000 50.86520687469688 2001 51.167741507513284 2002 50.6933018461464 2003 44.26267750701077 2004 46.772565941451525 2005 42.279697327640065 2006 16.516431153028645 2007 16.310532147276074 2008 17.753410280102806 2009 13.985311440898398 2010 17.241603693171577 2011 19.812356541135323 2012 20.282872883339095 2013 16.012807512123604 2014 14.707021478346363 2015 13.275014393116482 2016 18.546328272040853 2017 20.98829447102569 2018 27.811009592904384 2019 31.938986595574164 2020 36.73562512499034 2021 39.72639725142706 2022 27.851826719293754