Year	Number
2004-01-01	61
2005-01-01	73
2006-01-01	63
2007-01-01	73
2008-01-01	75
2009-01-01	54
2010-01-01	52
2011-01-01	50
2012-01-01	46
2013-01-01	44
2014-01-01	55
2015-01-01	111
2016-01-01	175
2017-01-01	187