Year	Number
2004-01-01	14829
2005-01-01	14995
2006-01-01	15176
2007-01-01	15268
2008-01-01	15467
2009-01-01	15500
2010-01-01	15957
2011-01-01	15410
2012-01-01	16638
2013-01-01	16661
2014-01-01	16621
2015-01-01	16724
2016-01-01	16827