Year	Number
2004-01-01	34
2005-01-01	56
2006-01-01	106
2007-01-01	112
2008-01-01	113
2009-01-01	115
2010-01-01	81
2011-01-01	81
2012-01-01	51
2013-01-01	53
2014-01-01	48
2015-01-01	42
2016-01-01	40