Year	Number
2004-01-01	7939
2005-01-01	8236
2006-01-01	9110
2007-01-01	9680
2008-01-01	10868
2009-01-01	12837
2010-01-01	13837
2011-01-01	25646
2012-01-01	29945
2013-01-01	31847
2014-01-01	32739
2015-01-01	32949
2016-01-01	32730