Year	Number
2005-01-01	5827
2006-01-01	4435
2007-01-01	11201
2008-01-01	19415
2009-01-01	22720
2010-01-01	26930
2011-01-01	16027
2012-01-01	6971
2013-01-01	7741
2014-01-01	8818
2015-01-01	8683
2016-01-01	13733