Year	Number
2004-01-01	70
2005-01-01	72
2006-01-01	75
2007-01-01	87
2008-01-01	75
2009-01-01	76
2010-01-01	59
2011-01-01	57
2012-01-01	55
2013-01-01	48
2014-01-01	51
2015-01-01	44