Year	Number
2004-01-01	304
2005-01-01	304
2006-01-01	305
2007-01-01	303
2008-01-01	303
2009-01-01	303
2010-01-01	303
2011-01-01	303
2012-01-01	301
2013-01-01	289
2014-01-01	268
2015-01-01	265
2016-01-01	262