Year	Number
2004-01-01	56
2005-01-01	55
2006-01-01	56
2007-01-01	132
2008-01-01	152
2009-01-01	165
2010-01-01	218
2011-01-01	75
2012-01-01	266
2013-01-01	275
2014-01-01	283
2015-01-01	297