Year	Number
2004-01-01	2544
2005-01-01	2527
2006-01-01	2447
2007-01-01	2000
2008-01-01	2198
2009-01-01	2178
2010-01-01	2218
2011-01-01	2323
2012-01-01	2395
2013-01-01	2518
2014-01-01	2445
2015-01-01	1967
2016-01-01	2469