Year	Number
2004-01-01	8160394
2005-01-01	9530198
2006-01-01	10272281
2007-01-01	11494454
2008-01-01	11272896
2009-01-01	10810633
2010-01-01	10590741
2011-01-01	12805754
2012-01-01	13805870
2013-01-01	15719265
2014-01-01	17173853