Year	Number
2004-01-01	2799
2005-01-01	3380
2006-01-01	3735
2007-01-01	4313
2008-01-01	4805
2009-01-01	5101
2010-01-01	5541
2011-01-01	5925
2012-01-01	6188
2013-01-01	5884
2014-01-01	5224
2015-01-01	5211