Year	Number
2004-01-01	429
2005-01-01	427
2006-01-01	426
2007-01-01	421
2008-01-01	419
2009-01-01	415
2010-01-01	410
2011-01-01	405
2012-01-01	397
2013-01-01	394
2014-01-01	383
2015-01-01	356
2016-01-01	314
2017-01-01	290