Year	Number
2004-01-01	75
2005-01-01	49
2006-01-01	55
2007-01-01	52
2008-01-01	71
2009-01-01	77
2010-01-01	86
2011-01-01	98
2012-01-01	98
2013-01-01	98
2014-01-01	85
2015-01-01	87
2016-01-01	88