Year	Number
2004-01-01	4310
2005-01-01	4306
2006-01-01	4308
2007-01-01	4273
2008-01-01	4409
2009-01-01	4482
2010-01-01	4643
2011-01-01	4819
2012-01-01	5108
2013-01-01	5425
2014-01-01	5797
2015-01-01	6020
2016-01-01	6195