Year % of GDP 1993 1.1662024638356263 1994 1.5425796286653994 1995 2.764444912191021 1996 1.7869023181568453 1997 1.5577689566438562 1998 1.8005456676731781 1999 2.038674947835825 2000 2.5575276087682592 2001 2.2510726501923517 2002 2.446801948136405 2003 5.532978779168196 2004 2.6368152579544017 2005 3.106585370530384 2006 2.9130690045912053 2007 2.740694275706413 2008 3.0434890152021095 2009 2.8764237593315665 2010 2.431584299012991 2011 2.110984281653625 2012 2.085175714224224 2013 1.7217295213322548 2014 1.5302940839428538 2015 2.5756381424393857 2016 1.8260229111756763