Year	Number
2007-01-01	0.4801
2008-01-01	0.4174
2009-01-01	0.4019
2010-01-01	0.4080
2011-01-01	0.4362
2012-01-01	0.4435
2013-01-01	0.4315
2014-01-01	0.6570
2015-01-01	0.7099
2016-01-01	0.8101