Year	Number
2004-01-01	5042.0
2005-01-01	6819.0
2006-01-01	5512.0
2007-01-01	7849.0
2008-01-01	9137.0
2009-01-01	10736.0
2010-01-01	11183.0
2011-01-01	10471.0
2012-01-01	11843.0
2013-01-01	13691.0
2014-01-01	14200.0
2015-01-01	7876.0
2016-01-01	6840.0
2017-01-01	10317.3