Year	% of GDP
1978	13.928384402217203
2005	1.0083167713382508
2006	0.32737846291331546
2007	1.3037057538237438
2008	1.2337952491309387
2010	1.3126694694694696
2011	2.5984488252710594
2012	1.8631641050661014
2013	0.7834226641391986