Year	Number
2004-01-01	0
2005-01-01	0
2006-01-01	87
2007-01-01	200
2008-01-01	292
2009-01-01	390
2010-01-01	681
2011-01-01	745
2012-01-01	849
2013-01-01	905
2014-01-01	970
2015-01-01	1074