Year	Number
2004-01-01	31100
2005-01-01	32367
2006-01-01	33633
2007-01-01	33979
2008-01-01	33282
2009-01-01	34996
2010-01-01	33666
2011-01-01	49807
2012-01-01	58459
2013-01-01	54508
2014-01-01	57107
2015-01-01	57121
2016-01-01	48441