Year	Number
2004-01-01	4001
2005-01-01	4812
2006-01-01	5392
2007-01-01	6184
2008-01-01	7056
2009-01-01	7562
2010-01-01	8200
2011-01-01	8719
2012-01-01	9238
2013-01-01	8856
2014-01-01	7963
2015-01-01	7976
2016-01-01	7725