Year	Number
2004-01-01	35
2005-01-01	35
2006-01-01	36
2007-01-01	41
2008-01-01	38
2009-01-01	41
2010-01-01	51
2011-01-01	61
2012-01-01	64
2013-01-01	69
2014-01-01	72
2015-01-01	57
2016-01-01	65
2017-01-01	48