Year	Number
2004-01-01	8.7717
2005-01-01	8.6838
2006-01-01	9.0594
2007-01-01	9.2932
2008-01-01	10.4058
2009-01-01	10.8511
2010-01-01	10.4773
2011-01-01	10.6957
2012-01-01	10.5004
2013-01-01	10.3109
2014-01-01	10.7602
2015-01-01	10.9539
2016-01-01	11.8303