Year	Number
2004-01-01	2165
2005-01-01	2040
2006-01-01	2161
2007-01-01	2340
2008-01-01	2392
2009-01-01	2392
2010-01-01	2555
2011-01-01	2499
2012-01-01	2674
2013-01-01	2560
2014-01-01	2561
2015-01-01	2495