Year	Number
2004-01-01	226
2005-01-01	225
2006-01-01	227
2007-01-01	216
2008-01-01	206
2009-01-01	202
2010-01-01	200
2011-01-01	203
2012-01-01	191
2013-01-01	188
2014-01-01	177
2015-01-01	173
2016-01-01	169