Year	Number
2004-01-01	105
2005-01-01	111
2006-01-01	140
2007-01-01	1460
2008-01-01	1995
2009-01-01	1251
2010-01-01	1509
2011-01-01	4896
2012-01-01	5443
2013-01-01	5799
2014-01-01	1260
2015-01-01	771
2016-01-01	770
2017-01-01	649