Year	Number
2004-01-01	83
2005-01-01	83
2006-01-01	83
2007-01-01	83
2008-01-01	81
2009-01-01	81
2010-01-01	80
2011-01-01	74
2012-01-01	68
2013-01-01	65
2014-01-01	63
2015-01-01	63
2016-01-01	62
2017-01-01	62