Year	Percent
2001-01-01	5.55459394816816
2002-01-01	3.53304214308075
2003-01-01	3.79908136671901
2004-01-01	4.47499289078105
2005-01-01	3.01332395058121
2006-01-01	3.37436360121208
2007-01-01	4.46616710098129
2008-01-01	1.70078176284532
2009-01-01	4.36234829325720
2010-01-01	3.35475770328918
2011-01-01	1.84266300756184
2012-01-01	6.31474450315182
2013-01-01	-4.29487331536753