Year	Number
2004-01-01	3738
2005-01-01	10872
2006-01-01	9865
2007-01-01	10762
2008-01-01	13049
2009-01-01	14181
2010-01-01	14181
2011-01-01	14181
2012-01-01	14173
2013-01-01	12126
2014-01-01	13823
2015-01-01	13921
2016-01-01	11004