Year	Number
2004-01-01	44
2005-01-01	57
2006-01-01	55
2007-01-01	39
2008-01-01	27
2009-01-01	20
2010-01-01	35
2011-01-01	36
2012-01-01	40
2013-01-01	24
2014-01-01	22
2015-01-01	19
2016-01-01	35