Year	Number
2004-01-01	0.0656
2005-01-01	0.1248
2006-01-01	0.1481
2007-01-01	0.1967
2008-01-01	0.2771
2009-01-01	0.3617
2010-01-01	0.4358
2011-01-01	0.5839
2012-01-01	0.6621
2013-01-01	0.8335
2014-01-01	0.9731