Year	Number
2007-01-01	6698680
2008-01-01	7152521
2009-01-01	7628948
2010-01-01	8158023
2011-01-01	8917117
2012-01-01	9273718
2013-01-01	9642871
2014-01-01	10114327
2015-01-01	10700858
2016-01-01	11115588