Year	Number
2004-01-01	49
2005-01-01	63
2006-01-01	58
2007-01-01	58
2008-01-01	60
2009-01-01	64
2010-01-01	64
2011-01-01	65
2012-01-01	65
2013-01-01	67
2014-01-01	61
2015-01-01	64
2016-01-01	60