Year	Number
2004-01-01	14
2005-01-01	17
2006-01-01	22
2007-01-01	24
2008-01-01	32
2009-01-01	41
2010-01-01	43
2011-01-01	49
2012-01-01	56
2013-01-01	64
2014-01-01	78
2015-01-01	69
2016-01-01	71