Year	Number
2004-01-01	15
2005-01-01	16
2006-01-01	16
2007-01-01	41
2008-01-01	41
2009-01-01	44
2010-01-01	45
2011-01-01	47
2012-01-01	58
2013-01-01	64
2014-01-01	78
2015-01-01	83
2016-01-01	96