Year	Number
2007-01-01	0.0737
2008-01-01	0.0796
2009-01-01	0.0825
2010-01-01	0.0854
2011-01-01	0.0873
2012-01-01	0.1009
2013-01-01	0.1484
2014-01-01	0.1591
2015-01-01	0.1727
2016-01-01	0.2076