Year	Number
2004-01-01	0.3922
2005-01-01	0.4278
2006-01-01	0.4991
2007-01-01	0.5348
2008-01-01	0.5704
2009-01-01	0.6061
2010-01-01	0.6774
2011-01-01	0.7130
2012-01-01	0.8913
2013-01-01	0.9269
2014-01-01	1.1052
2015-01-01	1.2834