Year	Number
2004-01-01	477
2005-01-01	477
2006-01-01	472
2007-01-01	442
2008-01-01	426
2009-01-01	432
2010-01-01	422
2011-01-01	426
2012-01-01	417
2013-01-01	350
2014-01-01	292
2015-01-01	251
2016-01-01	246
2017-01-01	0