Year	Number
2004-01-01	4559
2005-01-01	4656
2006-01-01	4772
2007-01-01	4953
2008-01-01	5097
2009-01-01	5043
2010-01-01	5018
2011-01-01	4890
2012-01-01	4732
2013-01-01	4511
2014-01-01	4416
2015-01-01	4392
2016-01-01	4296
2017-01-01	4186