Year	Number
2004-01-01	9012
2005-01-01	10854
2006-01-01	13622
2007-01-01	13632
2008-01-01	14524
2009-01-01	15958
2010-01-01	25582
2011-01-01	29313
2012-01-01	53591
2013-01-01	64955
2014-01-01	68454
2015-01-01	81500