Year	Number
2004-01-01	62
2005-01-01	65
2006-01-01	67
2007-01-01	68
2008-01-01	69
2009-01-01	69
2010-01-01	69
2011-01-01	75
2012-01-01	78
2013-01-01	77
2014-01-01	75
2015-01-01	75
2016-01-01	74
2017-01-01	70