Year	Number
2004-01-01	56
2005-01-01	56
2006-01-01	56
2007-01-01	56
2008-01-01	58
2009-01-01	60
2010-01-01	67
2011-01-01	79
2012-01-01	61
2013-01-01	82
2014-01-01	81
2015-01-01	82
2016-01-01	84