Year	Number
2004-01-01	9.7434
2005-01-01	9.7916
2006-01-01	10.1936
2007-01-01	11.3351
2008-01-01	11.0136
2009-01-01	10.4696
2010-01-01	9.8972
2011-01-01	9.3087
2012-01-01	6.8993
2013-01-01	5.9656
2014-01-01	5.5645
2015-01-01	4.8729
2016-01-01	4.5674