Year	Number
2004-01-01	20
2005-01-01	24
2006-01-01	24
2007-01-01	27
2008-01-01	28
2009-01-01	32
2010-01-01	35
2011-01-01	64
2012-01-01	124
2013-01-01	139
2014-01-01	145
2015-01-01	148