Year	Number
2004-01-01	5374347
2005-01-01	5949099
2006-01-01	6548791
2007-01-01	8010601
2008-01-01	8376372
2009-01-01	8131030
2010-01-01	8142185
2011-01-01	6653053
2012-01-01	6725657
2013-01-01	8046993
2014-01-01	8379459
2015-01-01	8945292
2016-01-01	9645753