Year	Number
2004-01-01	6952
2005-01-01	10377
2006-01-01	19977
2007-01-01	27725
2008-01-01	36329
2009-01-01	51593
2010-01-01	41583
2011-01-01	56120
2012-01-01	69556
2013-01-01	60096
2014-01-01	76505
2015-01-01	97338
2016-01-01	97091