Year	Number
2004-01-01	3492
2005-01-01	3242
2006-01-01	3004
2007-01-01	4254
2008-01-01	5255
2009-01-01	5578
2010-01-01	5799
2011-01-01	5810
2012-01-01	5408
2013-01-01	5636
2014-01-01	5440
2015-01-01	5462
2016-01-01	5552