Year	Number
2007-01-01	0.4706
2008-01-01	0.4238
2009-01-01	2.5650
2010-01-01	2.4801
2011-01-01	1.5016
2012-01-01	1.3487
2013-01-01	1.1555
2014-01-01	1.6304
2015-01-01	1.7721
2016-01-01	3.2279
2017-01-01	2.4949