Year	Number
2004-01-01	1303
2005-01-01	1367
2006-01-01	1439
2007-01-01	1441
2008-01-01	1341
2009-01-01	10628
2010-01-01	9944
2011-01-01	12751
2012-01-01	12714
2013-01-01	11738
2014-01-01	11133
2015-01-01	11003
2016-01-01	9072