Year	Number
2004-01-01	6117
2005-01-01	7002
2006-01-01	8362
2007-01-01	10287
2008-01-01	7636
2009-01-01	7655
2010-01-01	8889
2011-01-01	9523
2012-01-01	9422
2013-01-01	8259
2014-01-01	6689
2015-01-01	6474
2016-01-01	5399