Year	Number
2004-01-01	28
2005-01-01	75
2006-01-01	75
2007-01-01	89
2008-01-01	87
2009-01-01	87
2010-01-01	59
2011-01-01	59
2012-01-01	59
2013-01-01	60
2014-01-01	60
2015-01-01	60
2016-01-01	76
2017-01-01	81