Year	Number
2004-01-01	2107
2005-01-01	2795
2006-01-01	3144
2007-01-01	6013
2008-01-01	8407
2009-01-01	13871
2010-01-01	28323
2011-01-01	23460
2012-01-01	28429
2013-01-01	42677
2014-01-01	59002
2015-01-01	68790
2016-01-01	68808
2017-01-01	58977