Year	Number
2004-01-01	296
2005-01-01	293
2006-01-01	226
2007-01-01	184
2008-01-01	178
2009-01-01	171
2010-01-01	169
2011-01-01	169
2012-01-01	173
2013-01-01	157
2014-01-01	151
2015-01-01	157
2016-01-01	157