Year	Number
2004-01-01	10
2005-01-01	10
2006-01-01	10
2007-01-01	54
2008-01-01	64
2009-01-01	65
2010-01-01	67
2011-01-01	69
2012-01-01	70
2013-01-01	70
2014-01-01	70
2015-01-01	70