Year	Number
2004-01-01	39
2005-01-01	35
2006-01-01	50
2007-01-01	50
2008-01-01	59
2009-01-01	59
2010-01-01	48
2011-01-01	51
2012-01-01	64
2013-01-01	61
2014-01-01	44
2015-01-01	58
2016-01-01	59