Year	Number
2004-01-01	5
2005-01-01	4
2006-01-01	8
2007-01-01	12
2008-01-01	20
2009-01-01	27
2010-01-01	29
2011-01-01	35
2012-01-01	35
2013-01-01	41
2014-01-01	49
2015-01-01	34
2016-01-01	34