Year	Percent
2005-01-01	7.27661509576003
2006-01-01	6.93098396602019
2007-01-01	6.51418051151386
2008-01-01	7.02638574549407
2009-01-01	9.41825720055080
2010-01-01	7.43373724576310
2011-01-01	6.30563617713842
2012-01-01	5.66188797055546
2013-01-01	5.52456985599180
2014-01-01	6.26498995947611
2015-01-01	6.05282132211841
2016-01-01	6.44260865055882
2017-01-01	6.64870458386544