Year	Number
2004-01-01	1698
2005-01-01	1705
2006-01-01	1730
2007-01-01	1733
2008-01-01	1777
2009-01-01	1722
2010-01-01	1701
2011-01-01	1650
2012-01-01	1665
2013-01-01	1655
2014-01-01	1629
2015-01-01	1499
2016-01-01	1370
2017-01-01	1272