Year	Number
2004-01-01	5.2745
2005-01-01	6.0444
2006-01-01	5.8046
2007-01-01	5.7776
2008-01-01	5.8010
2009-01-01	5.6710
2010-01-01	5.6853
2011-01-01	5.4673
2012-01-01	5.3428
2013-01-01	5.3127
2014-01-01	5.1972
2015-01-01	5.1402
2016-01-01	5.0463