Year	Number
2004-01-01	373
2005-01-01	380
2006-01-01	405
2007-01-01	414
2008-01-01	403
2009-01-01	346
2010-01-01	270
2011-01-01	260
2012-01-01	239
2013-01-01	186
2014-01-01	182
2015-01-01	166
2016-01-01	164
2017-01-01	160