Year	Number
2004-01-01	461
2005-01-01	401
2006-01-01	345
2007-01-01	341
2008-01-01	302
2009-01-01	295
2010-01-01	290
2011-01-01	287
2012-01-01	260
2013-01-01	253
2014-01-01	211
2015-01-01	209
2016-01-01	94