Year	Number
2004-01-01	160775
2005-01-01	191850
2006-01-01	225816
2007-01-01	284921
2008-01-01	294762
2009-01-01	282762
2010-01-01	288749
2011-01-01	361851
2012-01-01	475267
2013-01-01	669332