Year	Number
2004-01-01	11.7216
2005-01-01	11.5102
2006-01-01	11.1708
2007-01-01	10.7553
2008-01-01	10.3048
2009-01-01	10.2413
2010-01-01	10.2230
2011-01-01	9.9648
2012-01-01	9.7693
2013-01-01	9.4374
2014-01-01	9.3197
2015-01-01	9.2582
2016-01-01	8.9840