Year	Number
2004-01-01	109503
2005-01-01	130399
2006-01-01	145357
2007-01-01	174708
2008-01-01	271721
2009-01-01	270462
2010-01-01	187755
2011-01-01	349191
2012-01-01	378281
2013-01-01	383441
2014-01-01	399933
2015-01-01	448497
2016-01-01	494472