Year	% of GDP
2006	21.26143265658554
2007	16.86176920294042
2008	14.579335143729038
2009	-3.11758068264308
2010	-4.092641334996141
2011	2.240502130871601
2012	-7.6625358218893265
2013	-2.6106217588619587
2014	-1.499601929941903