Year	Number
2004-01-01	2777
2005-01-01	2085
2006-01-01	3250
2007-01-01	1672
2008-01-01	5418
2009-01-01	4310
2010-01-01	3642
2011-01-01	2642
2012-01-01	2043
2013-01-01	1719
2014-01-01	2005
2015-01-01	3413
2016-01-01	5394
2017-01-01	7419