Year	Number
2004-01-01	9.2568
2005-01-01	9.6335
2006-01-01	10.5864
2007-01-01	11.3093
2008-01-01	11.6467
2009-01-01	11.3010
2010-01-01	11.1368
2011-01-01	10.8777
2012-01-01	10.4653
2013-01-01	11.0221
2014-01-01	12.2068
2015-01-01	12.2698
2016-01-01	11.8421
2017-01-01	11.6863