Year	Number
2006-01-01	0.4304
2007-01-01	0.4879
2008-01-01	0.4369
2009-01-01	0.4050
2010-01-01	0.5816
2011-01-01	0.6399
2012-01-01	0.7220
2013-01-01	0.8188
2014-01-01	0.8643
2015-01-01	0.6814