Year	Number
2004-01-01	275865
2005-01-01	308058
2006-01-01	340067
2007-01-01	384832
2008-01-01	397073
2009-01-01	368772
2010-01-01	371328
2011-01-01	357200
2012-01-01	389419
2013-01-01	412302
2014-01-01	446524
2015-01-01	454364
2016-01-01	478074