Year	Percent
2004-01-01	1.430838685273420
2005-01-01	1.685488905283490
2006-01-01	2.095259356114300
2007-01-01	2.498945757258040
2008-01-01	4.293202492877060
2009-01-01	2.199592370460110
2010-01-01	2.585418155825890
2011-01-01	2.899795843001210
2012-01-01	2.827332242225870
2013-01-01	1.604392980780710
2014-01-01	1.112963033738590
2015-01-01	0.145686073241013
2016-01-01	0.573948019801976
2017-01-01	1.045976834689520