Year	Number
2004-01-01	7268535
2005-01-01	10918777
2006-01-01	12022202
2007-01-01	12184110
2008-01-01	12771322
2009-01-01	11929227
2010-01-01	9688937
2011-01-01	9098313
2012-01-01	8018512
2013-01-01	7259764
2014-01-01	6928534
2015-01-01	6954924