Year	Number
2004-01-01	5374599
2005-01-01	5949343
2006-01-01	6549111
2007-01-01	8010927
2008-01-01	8376706
2009-01-01	8131604
2010-01-01	8142767
2011-01-01	6665516
2012-01-01	6737384
2013-01-01	8057312
2014-01-01	8386482
2015-01-01	8952425
2016-01-01	9654060