Year % of GDP 1995 2.826781369538366 1996 2.205243133731109 1997 5.469667683467744 1998 4.431031315282638 1999 2.8710503588323157 2000 3.0682730938916243 2001 3.401306681509447 2002 2.7485393589520353 2003 2.3195459115729897 2004 2.282389433896395 2005 2.405791869945496 2006 2.5352233375930435 2007 2.1743320398828736 2008 2.344228724039384 2009 2.6435248929024198 2010 2.2052136534039644 2011 2.355644036012336 2012 2.374482881748556 2013 2.6193272146474627 2014 2.867725296801012 2015 4.838976957905125 2016 2.7775937096417795