Year	Number
2004-01-01	387
2005-01-01	398
2006-01-01	411
2007-01-01	446
2008-01-01	469
2009-01-01	469
2010-01-01	456
2011-01-01	442
2012-01-01	414
2013-01-01	407
2014-01-01	382
2015-01-01	361
2016-01-01	310
2017-01-01	294