Year	Percent
2005-01-01	4.61792318043976
2006-01-01	3.69606922548464
2007-01-01	3.39077458542386
2008-01-01	3.70112207184760
2009-01-01	4.93940194635992
2010-01-01	3.98503121277985
2011-01-01	3.42239089210246
2012-01-01	3.03665011118982
2013-01-01	2.96364802477270
2014-01-01	3.39599488178663
2015-01-01	3.26020837223814
2016-01-01	3.45881408369160
2017-01-01	3.57110034713861