Year	Number
2004-01-01	71
2005-01-01	71
2006-01-01	71
2007-01-01	71
2008-01-01	71
2009-01-01	71
2010-01-01	69
2011-01-01	54
2012-01-01	51
2013-01-01	30
2014-01-01	53
2015-01-01	56