Year	Number
2004-01-01	35643
2005-01-01	41045
2006-01-01	44496
2007-01-01	52499
2008-01-01	61272
2009-01-01	67653
2010-01-01	8994
2011-01-01	9068
2012-01-01	10949
2013-01-01	11411
2014-01-01	10239
2015-01-01	12425
2016-01-01	13590