Year	Number
2004-01-01	10.4448
2005-01-01	10.5565
2006-01-01	11.0008
2007-01-01	11.8594
2008-01-01	11.9515
2009-01-01	11.9271
2010-01-01	12.2764
2011-01-01	12.6672
2012-01-01	12.9240
2013-01-01	11.9683
2014-01-01	11.5952
2015-01-01	11.5538
2016-01-01	11.0275