Year	Number
2004-01-01	31200
2005-01-01	33329
2006-01-01	35801
2007-01-01	39934
2008-01-01	42242
2009-01-01	41147
2010-01-01	41653
2011-01-01	43642
2012-01-01	45368
2013-01-01	45577
2014-01-01	43716
2015-01-01	38758
2016-01-01	35405