Year	Number
2004-01-01	7.7541
2005-01-01	8.2689
2006-01-01	9.0746
2007-01-01	9.7068
2008-01-01	10.3075
2009-01-01	10.7921
2010-01-01	11.0060
2011-01-01	11.3371
2012-01-01	11.6869
2013-01-01	12.0951
2014-01-01	12.5264
2015-01-01	12.5407
2016-01-01	12.3722