Year	Number
2004-01-01	379
2005-01-01	375
2006-01-01	396
2007-01-01	435
2008-01-01	472
2009-01-01	501
2010-01-01	569
2011-01-01	611
2012-01-01	637
2013-01-01	1547
2014-01-01	1632
2015-01-01	1705