Year	Number
2004-01-01	247
2005-01-01	230
2006-01-01	217
2007-01-01	213
2008-01-01	208
2009-01-01	201
2010-01-01	199
2011-01-01	191
2012-01-01	182
2013-01-01	175
2014-01-01	173
2015-01-01	164
2016-01-01	164
2017-01-01	157