Year	Number
2007-01-01	0.8178
2008-01-01	0.7399
2009-01-01	0.7399
2010-01-01	0.7788
2011-01-01	0.8567
2012-01-01	0.8956
2013-01-01	0.8956
2014-01-01	1.4019
2015-01-01	1.5576
2016-01-01	1.8302