Year	Number
2004-01-01	393631
2005-01-01	377182
2006-01-01	412866
2007-01-01	407817
2008-01-01	433368
2009-01-01	440612
2010-01-01	410189
2011-01-01	395065
2012-01-01	371386
2013-01-01	326660
2014-01-01	305469
2015-01-01	325483
2016-01-01	324239