Year	Number
2004-01-01	3
2005-01-01	5
2006-01-01	7
2007-01-01	9
2008-01-01	24
2009-01-01	26
2010-01-01	23
2011-01-01	49
2012-01-01	53
2013-01-01	44
2014-01-01	38
2015-01-01	38