Year	Number
2004-01-01	6468
2005-01-01	6724
2006-01-01	6998
2007-01-01	7273
2008-01-01	7536
2009-01-01	7422
2010-01-01	7504
2011-01-01	7623
2012-01-01	7747
2013-01-01	7701
2014-01-01	7433
2015-01-01	7313
2016-01-01	7136