Year	Number
2004-01-01	58
2005-01-01	60
2006-01-01	70
2007-01-01	74
2008-01-01	78
2009-01-01	77
2010-01-01	79
2011-01-01	79
2012-01-01	66
2013-01-01	59
2014-01-01	53
2015-01-01	52
2016-01-01	42