Year	Number
2004-01-01	25
2005-01-01	25
2006-01-01	41
2007-01-01	56
2008-01-01	64
2009-01-01	66
2010-01-01	69
2011-01-01	86
2012-01-01	114
2013-01-01	194
2014-01-01	224