Year	Number
2007-01-01	4867558
2008-01-01	4998367
2009-01-01	5094229
2010-01-01	5164422
2011-01-01	6386599
2012-01-01	6561221
2013-01-01	6576276
2014-01-01	6548788
2015-01-01	6447046
2016-01-01	6578678
2017-01-01	6589087