Year	Number
2004-01-01	0.0200
2005-01-01	0.0194
2006-01-01	0.0305
2007-01-01	0.0409
2008-01-01	0.0682
2009-01-01	0.0978
2010-01-01	0.2976
2011-01-01	0.3168
2012-01-01	0.4603