Year	Number
2004-01-01	27775
2005-01-01	39898
2006-01-01	52971
2007-01-01	55839
2008-01-01	63589
2009-01-01	71764
2010-01-01	93995
2011-01-01	114355
2012-01-01	125194
2013-01-01	126136
2014-01-01	129447
2015-01-01	137214
2016-01-01	180437