Year % of GDP 1984 2.7642277231806487 1985 4.037559054332261 1986 3.6137440286957263 1987 6.092436843597736 1988 13.62861980619267 1989 12.130675210744664 1990 11.328763293632724 1991 12.953726480142121 1992 17.02575542691907 1993 21.461619264088604 1994 24.986940717685563 1995 23.220388914756366 1996 22.69874962490583 1997 23.892224791023075 1998 36.455872754924876 1999 35.87584152414758 2000 30.662003601608482 2001 27.87315887350495 2002 28.752514664277523 2003 23.500433162778837 2004 24.912122565161514 2005 28.963735722006685 2006 38.15507752301793 2007 33.61431308286353 2008 33.15408047508676 2009 30.083069674643237 2010 35.38402603795605 2011 40.34315609768163 2012 37.87672835017588 2013 38.17310339830045 2014 40.75454665114967 2015 33.9522573081909 2016 33.20942745612203