Year	Number
2004-01-01	60
2005-01-01	61
2006-01-01	62
2007-01-01	62
2008-01-01	69
2009-01-01	81
2010-01-01	81
2011-01-01	77
2012-01-01	75
2013-01-01	75
2014-01-01	76
2015-01-01	80
2016-01-01	83