Year	Number
2004-01-01	951
2005-01-01	1024
2006-01-01	1094
2007-01-01	1216
2008-01-01	1283
2009-01-01	1454
2010-01-01	1514
2011-01-01	1556
2012-01-01	1561
2013-01-01	1574
2014-01-01	1586
2015-01-01	1522