Year	Number
2004-01-01	11.082049370
2005-01-01	10.446892280
2006-01-01	9.803119498
2007-01-01	11.416893340
2008-01-01	11.541570880
2009-01-01	11.430274900
2010-01-01	11.424164100
2011-01-01	10.311176760
2012-01-01	12.045239570
2013-01-01	10.956744430
2014-01-01	9.171230753