Year	Number
2004-01-01	7527
2005-01-01	8084
2006-01-01	9465
2007-01-01	11244
2008-01-01	11801
2009-01-01	8795
2010-01-01	4960
2011-01-01	3107
2012-01-01	2633
2013-01-01	2973