Year	Number
2004-01-01	20124
2005-01-01	21912
2006-01-01	25936
2007-01-01	27054
2008-01-01	29511
2009-01-01	35492
2010-01-01	40546
2011-01-01	44847
2012-01-01	47065
2013-01-01	53900
2014-01-01	68700
2015-01-01	85500
2016-01-01	68050