Year	% of GDP
2004	1.0077611339540065
2005	2.8526010667470763
2006	2.3144479730675167
2007	1.337447236761607
2008	2.4434826679566335
2009	4.150514225354612
2010	4.28788486046476
2011	5.645089036402546
2012	6.333998331266209
2013	5.454398759380533
2015	8.16159300890485
2016	9.238323768889629