Year	Number
2004-01-01	93
2005-01-01	88
2006-01-01	86
2007-01-01	86
2008-01-01	94
2009-01-01	97
2010-01-01	98
2011-01-01	99
2012-01-01	97
2013-01-01	97
2014-01-01	97
2015-01-01	94
2016-01-01	93
2017-01-01	92