Year	Number
2004-01-01	1983
2005-01-01	2081
2006-01-01	2304
2007-01-01	2575
2008-01-01	2926
2009-01-01	3349
2010-01-01	3882
2011-01-01	4282
2012-01-01	4576
2013-01-01	5104
2014-01-01	5305
2015-01-01	5488