Year	Number
2004-01-01	4005
2005-01-01	3341
2006-01-01	3356
2007-01-01	3504
2008-01-01	3421
2009-01-01	3137
2010-01-01	2864
2011-01-01	2653
2012-01-01	2466
2013-01-01	2165
2014-01-01	1854
2015-01-01	1764
2016-01-01	1674