Year	Number
2004-01-01	4510
2005-01-01	4441
2006-01-01	4326
2007-01-01	4287
2008-01-01	4266
2009-01-01	4241
2010-01-01	4207
2011-01-01	4150
2012-01-01	4134
2013-01-01	4069
2014-01-01	4002
2015-01-01	3931
2016-01-01	3906