Year	Number
2004-01-01	5307
2005-01-01	5219
2006-01-01	5164
2007-01-01	4949
2008-01-01	4584
2009-01-01	4937
2010-01-01	6041
2011-01-01	6084
2012-01-01	6348
2013-01-01	6418
2014-01-01	6890
2015-01-01	7228
2016-01-01	7511