Year	Number
2004-01-01	69
2005-01-01	72
2006-01-01	77
2007-01-01	73
2008-01-01	75
2009-01-01	73
2010-01-01	80
2011-01-01	77
2012-01-01	78
2013-01-01	78
2014-01-01	76
2015-01-01	76
2016-01-01	76
2017-01-01	75