Year	Number
2004-01-01	6044
2005-01-01	8229
2006-01-01	7308
2007-01-01	7018
2008-01-01	7569
2009-01-01	8221
2010-01-01	9071
2011-01-01	9727
2012-01-01	11255
2013-01-01	23041
2014-01-01	43696
2015-01-01	102120
2016-01-01	134405