Year	Number
2004-01-01	11
2005-01-01	11
2006-01-01	12
2007-01-01	12
2008-01-01	9
2009-01-01	9
2010-01-01	8
2011-01-01	11872
2012-01-01	10798
2013-01-01	10265
2014-01-01	6961
2015-01-01	7049
2016-01-01	7606