Year	Number
2004-01-01	1773
2005-01-01	2741
2006-01-01	9898
2007-01-01	22809
2008-01-01	29284
2009-01-01	28529
2010-01-01	29142
2011-01-01	31580
2012-01-01	35439
2013-01-01	46489
2014-01-01	49207
2015-01-01	39712
2016-01-01	42420