Year % of GDP 1974 5.5050070998374485 1975 5.156193867935951 1976 7.605376371152574 1977 6.6771724757565485 1978 4.936855163045685 1979 1.148416124117959 1980 37.70858511302323 1981 29.48404922197914 1982 21.387990785294736 1983 21.903892361528193 1984 23.307002791281246 1985 15.312796278961471 1986 18.551000894506817 1987 22.47848480967641 1988 14.77027977844269 1989 40.077187589541374 1990 31.18550265338295 1991 25.811342708321405 1992 32.804567657134776 1993 33.52558065713878 1994 27.691187641221198 1995 4.4779754216299015 1996 8.65011657884107 1997 6.858661707994996 1998 6.980313038582116 1999 8.093533409836635 2000 7.722525942630407 2001 14.150559955434785 2002 5.788234170627937 2003 10.1798206281536 2004 16.298993845072854 2005 10.394927148652412 2006 14.965671793729642 2007 18.991888170225817 2008 23.687301096625163 2009 17.594116149870807 2010 16.543891561242948 2011 15.516837957481144 2012 12.884144540356493 2013 8.311237728675842 2014 14.082466983779327 2015 12.444217461362909 2016 15.575095705524628 2017 14.650534751290165 2018 18.094484842996078 2019 16.12877344315695 2020 8.562249742334114 2021 11.242505374465834 2022 15.562577752976168