Year	Number
2008-01-01	0.7360
2009-01-01	0.7790
2010-01-01	0.8357
2011-01-01	0.9316
2012-01-01	0.9969
2013-01-01	1.0536
2014-01-01	1.0914
2015-01-01	1.0553
2016-01-01	1.1430
2017-01-01	1.1860