Year	Number
2005-01-01	0.4533
2006-01-01	0.4765
2007-01-01	0.5164
2008-01-01	0.5561
2009-01-01	0.5829
2010-01-01	0.6107
2011-01-01	0.6422
2012-01-01	0.6726
2013-01-01	0.7023
2014-01-01	0.7368
2015-01-01	0.7644
2016-01-01	0.7652
2017-01-01	0.8193