Year	Number
2004-01-01	276
2005-01-01	257
2006-01-01	296
2007-01-01	329
2008-01-01	357
2009-01-01	444
2010-01-01	401
2011-01-01	467
2012-01-01	529
2013-01-01	530
2014-01-01	369
2015-01-01	358