Year	Number
2004-01-01	49
2005-01-01	53
2006-01-01	58
2007-01-01	64
2008-01-01	68
2009-01-01	70
2010-01-01	74
2011-01-01	78
2012-01-01	84
2013-01-01	84
2014-01-01	87
2015-01-01	91
2016-01-01	104
2017-01-01	112