Year	Number
2004-01-01	50
2005-01-01	50
2006-01-01	48
2007-01-01	48
2008-01-01	48
2009-01-01	47
2010-01-01	48
2011-01-01	44
2012-01-01	43
2013-01-01	38
2014-01-01	37
2015-01-01	34
2016-01-01	32