Year	Percent
2005-01-01	2.81331957163752
2006-01-01	2.82197310257734
2007-01-01	2.88263093414375
2008-01-01	3.10938297490549
2009-01-01	4.49573813648738
2010-01-01	4.49234780778174
2011-01-01	4.33782280862297
2012-01-01	4.09642234583511
2013-01-01	4.18682053671391
2014-01-01	4.09772524721635
2015-01-01	3.69883329075342
2016-01-01	3.36451359969329
2017-01-01	2.96051961202185