Year	Number
2004-01-01	7040
2005-01-01	7339
2006-01-01	7695
2007-01-01	8160
2008-01-01	8735
2009-01-01	9050
2010-01-01	9333
2011-01-01	9763
2012-01-01	10295
2013-01-01	10943
2014-01-01	11551
2015-01-01	12293
2016-01-01	12995