Year	Number
2005-01-01	54
2006-01-01	52
2007-01-01	50
2008-01-01	45
2009-01-01	45
2010-01-01	44
2011-01-01	46
2012-01-01	46
2013-01-01	42
2014-01-01	69
2015-01-01	68
2016-01-01	68
2017-01-01	72