Year	Number
2004-01-01	363
2005-01-01	352
2006-01-01	368
2007-01-01	352
2008-01-01	335
2009-01-01	320
2010-01-01	295
2011-01-01	271
2012-01-01	250
2013-01-01	228
2014-01-01	283
2015-01-01	271
2016-01-01	181