Year	Number
2004-01-01	10
2005-01-01	18
2006-01-01	38
2007-01-01	44
2008-01-01	53
2009-01-01	137
2010-01-01	201
2011-01-01	385
2012-01-01	395
2013-01-01	7033
2014-01-01	5643
2015-01-01	3968
2016-01-01	10748