Year	Number
2004-01-01	5606
2005-01-01	5619
2006-01-01	5525
2007-01-01	5743
2008-01-01	5961
2009-01-01	5916
2010-01-01	5849
2011-01-01	3777
2012-01-01	3833
2013-01-01	3770
2014-01-01	3720
2015-01-01	3684
2016-01-01	2936
2017-01-01	3060