Year	Number
2004-01-01	1700
2005-01-01	1854
2006-01-01	1995
2007-01-01	2166
2008-01-01	2250
2009-01-01	2279
2010-01-01	2339
2011-01-01	2405
2012-01-01	2508
2013-01-01	2581
2014-01-01	2707
2015-01-01	2735
2016-01-01	2765
2017-01-01	2794