Year	Number
2004-01-01	540
2005-01-01	610
2006-01-01	635
2007-01-01	703
2008-01-01	754
2009-01-01	619
2010-01-01	624
2011-01-01	656
2012-01-01	519
2013-01-01	448
2014-01-01	367
2015-01-01	316