Year	Number
2004-01-01	76102
2005-01-01	58768
2006-01-01	81548
2007-01-01	113568
2008-01-01	144665
2009-01-01	164643
2010-01-01	183603
2011-01-01	224351
2012-01-01	277197
2013-01-01	336438
2014-01-01	435396
2015-01-01	423789