Year	Number
2004-01-01	9200
2005-01-01	8868
2006-01-01	8604
2007-01-01	8329
2008-01-01	8025
2009-01-01	7769
2010-01-01	7545
2011-01-01	7295
2012-01-01	7008
2013-01-01	6737
2014-01-01	6451
2015-01-01	6191
2016-01-01	5954