Year	Number
2004-01-01	269
2005-01-01	317
2006-01-01	333
2007-01-01	362
2008-01-01	408
2009-01-01	352
2010-01-01	423
2011-01-01	511
2012-01-01	422
2013-01-01	342
2014-01-01	320
2015-01-01	389
2016-01-01	428