Year	Number
2004-01-01	13267
2005-01-01	13005
2006-01-01	12959
2007-01-01	12973
2008-01-01	13023
2009-01-01	13256
2010-01-01	13340
2011-01-01	13308
2012-01-01	13160
2013-01-01	12941
2014-01-01	12908
2015-01-01	12903
2016-01-01	12576