Year	Number
2007-01-01	9809
2008-01-01	11138
2009-01-01	10845
2010-01-01	10412
2011-01-01	9924
2012-01-01	9233
2013-01-01	8081
2014-01-01	7558
2015-01-01	6671
2016-01-01	5857
2017-01-01	3521