Year	Number
2004-01-01	371
2005-01-01	368
2006-01-01	364
2007-01-01	364
2008-01-01	360
2009-01-01	352
2010-01-01	340
2011-01-01	63
2012-01-01	67
2013-01-01	59
2014-01-01	56
2015-01-01	53
2016-01-01	52
2017-01-01	77