Year	Number
2004-01-01	2899
2005-01-01	3243
2006-01-01	3729
2007-01-01	4611
2008-01-01	5377
2009-01-01	9383
2010-01-01	14541
2011-01-01	21175
2012-01-01	20430
2013-01-01	67917
2014-01-01	74838
2015-01-01	75347
2016-01-01	71970
2017-01-01	72850