Year	Number
2004-01-01	7.1665
2005-01-01	7.6678
2006-01-01	8.6856
2007-01-01	8.8147
2008-01-01	9.1869
2009-01-01	9.4034
2010-01-01	9.4869
2011-01-01	10.1098
2012-01-01	9.9692
2013-01-01	9.7376
2014-01-01	9.6768
2015-01-01	9.6768