Year	Number
2004-01-01	268
2005-01-01	278
2006-01-01	299
2007-01-01	312
2008-01-01	325
2009-01-01	328
2010-01-01	323
2011-01-01	314
2012-01-01	307
2013-01-01	301
2014-01-01	305
2015-01-01	295
2016-01-01	293