Year	Number
2004-01-01	424
2005-01-01	428
2006-01-01	395
2007-01-01	389
2008-01-01	387
2009-01-01	446
2010-01-01	444
2011-01-01	440
2012-01-01	442
2013-01-01	565
2014-01-01	610
2015-01-01	629
2016-01-01	629