Year	Number
2004-01-01	6.6196
2005-01-01	6.3121
2006-01-01	6.6556
2007-01-01	7.6153
2008-01-01	8.5281
2009-01-01	8.4869
2010-01-01	8.8150
2011-01-01	8.4024
2012-01-01	8.4303
2013-01-01	8.5936
2014-01-01	8.7478
2015-01-01	8.0963
2016-01-01	8.3189