Year	Number
2004-01-01	53
2005-01-01	50
2006-01-01	52
2007-01-01	53
2008-01-01	53
2009-01-01	50
2010-01-01	49
2011-01-01	50
2012-01-01	45
2013-01-01	44
2014-01-01	41
2015-01-01	38
2016-01-01	34