Year	Number
2004-01-01	8.2440
2005-01-01	8.4932
2006-01-01	8.7533
2007-01-01	9.0674
2008-01-01	9.2894
2009-01-01	9.5910
2010-01-01	9.5570
2011-01-01	9.5757
2012-01-01	9.6010
2013-01-01	9.3441
2014-01-01	9.0928
2015-01-01	9.3617
2016-01-01	9.3435