Year	Number
2007-01-01	6.0841
2008-01-01	5.9728
2009-01-01	6.5484
2010-01-01	6.6016
2011-01-01	6.1468
2012-01-01	5.9654
2013-01-01	7.0966
2014-01-01	7.3081
2015-01-01	7.1828
2016-01-01	6.9526