Year	Number
2004-01-01	10
2005-01-01	18
2006-01-01	35
2007-01-01	31
2008-01-01	35
2009-01-01	97
2010-01-01	156
2011-01-01	324
2012-01-01	319
2013-01-01	7033
2014-01-01	5637
2015-01-01	3965
2016-01-01	10746