Year	Number
2004-01-01	5754031
2005-01-01	6160750
2006-01-01	6676443
2007-01-01	6664246
2008-01-01	9223448
2009-01-01	7178709
2010-01-01	7473102
2011-01-01	11739381
2012-01-01	14258353
2013-01-01	12126876
2014-01-01	11643694
2015-01-01	11097598