Year	Number
2004-01-01	62
2005-01-01	64
2006-01-01	69
2007-01-01	69
2008-01-01	71
2009-01-01	70
2010-01-01	70
2011-01-01	67
2012-01-01	69
2013-01-01	69
2014-01-01	66
2015-01-01	65
2016-01-01	64