Year	Number
2007-01-01	0.1958
2008-01-01	0.2086
2009-01-01	0.2823
2010-01-01	0.3230
2011-01-01	0.4489
2012-01-01	0.5494
2013-01-01	0.6498
2014-01-01	0.7732
2015-01-01	0.9219
2016-01-01	1.2284
2017-01-01	1.5921