Year	Number
2005-01-01	0.1320
2006-01-01	0.1358
2007-01-01	0.1436
2008-01-01	0.1436
2009-01-01	0.1630
2010-01-01	0.1863
2011-01-01	0.2173
2012-01-01	0.3842
2013-01-01	0.4153