Year	Number
2004-01-01	3224
2005-01-01	7775
2006-01-01	15171
2007-01-01	51854
2008-01-01	63192
2009-01-01	18708
2010-01-01	16962
2011-01-01	23733
2012-01-01	11567
2013-01-01	13551
2014-01-01	17838
2015-01-01	20238
2016-01-01	199
2017-01-01	224