Year	Number
2004-01-01	10158
2005-01-01	10188
2006-01-01	10500
2007-01-01	10614
2008-01-01	13201
2009-01-01	12941
2010-01-01	12863
2011-01-01	12544
2012-01-01	11935
2013-01-01	11635
2014-01-01	11768
2015-01-01	11552
2016-01-01	11619