Year	Number
2004-01-01	3278
2005-01-01	3328
2006-01-01	3498
2007-01-01	3589
2008-01-01	3679
2009-01-01	3613
2010-01-01	3640
2011-01-01	3676
2012-01-01	3708
2013-01-01	3660
2014-01-01	3497
2015-01-01	3400