Year	Number
2004-01-01	7809
2005-01-01	9716
2006-01-01	18589
2007-01-01	31976
2008-01-01	46178
2009-01-01	47824
2010-01-01	49060
2011-01-01	64841
2012-01-01	51428
2013-01-01	60188
2014-01-01	87084
2015-01-01	61283