Year	Number
2005-01-01	1897
2006-01-01	2138
2007-01-01	2343
2008-01-01	2414
2009-01-01	2468
2010-01-01	3430
2011-01-01	3969
2012-01-01	4022
2013-01-01	4187
2014-01-01	4174
2015-01-01	4737