Year	Number
2004-01-01	682
2005-01-01	668
2006-01-01	664
2007-01-01	676
2008-01-01	665
2009-01-01	673
2010-01-01	661
2011-01-01	653
2012-01-01	658
2013-01-01	587
2014-01-01	540
2015-01-01	529
2016-01-01	523
2017-01-01	503