Year	Number
2004-01-01	27493
2005-01-01	27732
2006-01-01	28684
2007-01-01	28303
2008-01-01	29008
2009-01-01	32160
2010-01-01	33217
2011-01-01	35409
2012-01-01	36346
2013-01-01	37540
2014-01-01	38526
2015-01-01	30296
2016-01-01	28301