Year	Number
2005-01-01	4018
2006-01-01	4489
2007-01-01	4891
2008-01-01	5226
2009-01-01	5380
2010-01-01	7681
2011-01-01	8529
2012-01-01	8819
2013-01-01	9395
2014-01-01	9666
2015-01-01	10429