Year	Number
2004-01-01	309
2005-01-01	309
2006-01-01	324
2007-01-01	329
2008-01-01	334
2009-01-01	333
2010-01-01	340
2011-01-01	342
2012-01-01	324
2013-01-01	323
2014-01-01	315
2015-01-01	312
2016-01-01	299
2017-01-01	288