Year	Number
2004-01-01	7
2005-01-01	28
2006-01-01	52
2007-01-01	97
2008-01-01	95
2009-01-01	230
2010-01-01	228
2011-01-01	311
2012-01-01	275
2013-01-01	244
2014-01-01	227
2015-01-01	1912
2016-01-01	2821