Year	Number
2004-01-01	165
2005-01-01	158
2006-01-01	13
2008-01-01	114
2009-01-01	75
2010-01-01	75
2011-01-01	77
2012-01-01	64
2013-01-01	47
2014-01-01	44
2015-01-01	33
2016-01-01	31
2017-01-01	28