Year % of GDP 1971 0 1972 0 1973 0 1974 0 1975 0 1976 0 1977 0 1978 0 1979 0 1980 0 1981 0 1982 0 1983 0 1984 0 1985 0 1986 0 1987 0 1988 0 1989 0 1990 0 1991 0 1992 0 1993 0 1994 0 1995 0 1996 0 1997 0 1998 0 1999 0 2000 0 2001 0 2002 0.0283908073416018 2003 0.0374595979479728 2004 0.0613781507663448 2005 0.13263457054308 2006 0.145655110180747 2007 0.177661149458376 2008 0.177814056910713 2009 0.0442489217587359 2010 0 2011 0 2012 0.0649850267861909 2013 0.0577584252152377 2014 0.0518301508258059 2015 0.0200960578384208 2016 0.0158677459016205 2017 0.00585553483434446 2018 0.00900722494170017 2019 0.00698634796129753 2020 0.00341590826010993 2021 0.00896579369125843