Year	Number
2004-01-01	1963
2005-01-01	2655
2006-01-01	2832
2007-01-01	9070
2008-01-01	10302
2009-01-01	11584
2010-01-01	11604
2011-01-01	11984
2012-01-01	14139
2013-01-01	15223
2014-01-01	14682
2015-01-01	15170
2016-01-01	15777