Year	Number
2004-01-01	583
2005-01-01	586
2006-01-01	610
2007-01-01	682
2008-01-01	658
2009-01-01	624
2010-01-01	587
2011-01-01	549
2012-01-01	400
2013-01-01	343
2014-01-01	319
2015-01-01	276
2016-01-01	261