Year	Number
2004-01-01	64
2005-01-01	62
2006-01-01	65
2007-01-01	57
2008-01-01	55
2009-01-01	52
2010-01-01	57
2011-01-01	57
2012-01-01	47
2013-01-01	45
2014-01-01	45
2015-01-01	41
2016-01-01	40