Year	Number
2004-01-01	1646
2005-01-01	1647
2006-01-01	1655
2007-01-01	1670
2008-01-01	1674
2009-01-01	1628
2010-01-01	1596
2011-01-01	1546
2012-01-01	1489
2013-01-01	1422
2014-01-01	1374
2015-01-01	1326
2016-01-01	1282
2017-01-01	1233