Year	Number
2004-01-01	67
2005-01-01	69
2006-01-01	71
2007-01-01	73
2008-01-01	70
2009-01-01	74
2010-01-01	75
2011-01-01	75
2012-01-01	76
2013-01-01	76
2014-01-01	77
2015-01-01	75
2016-01-01	81
2017-01-01	80