Year	Number
2004-01-01	35
2005-01-01	280
2006-01-01	1256
2007-01-01	3774
2008-01-01	9720
2009-01-01	23751
2010-01-01	33987
2011-01-01	35637
2012-01-01	44574
2013-01-01	51932
2014-01-01	62383
2015-01-01	65323
2016-01-01	76555