Year	Number
2004-01-01	12.8202
2005-01-01	12.7818
2006-01-01	13.3512
2007-01-01	13.4674
2008-01-01	13.5696
2009-01-01	13.3977
2010-01-01	13.5754
2011-01-01	13.5279
2012-01-01	12.7266
2013-01-01	12.5740
2014-01-01	12.1995
2015-01-01	11.9777
2016-01-01	11.4271
2017-01-01	11.0216