Year	Number
2004-01-01	8.7478
2005-01-01	8.8294
2006-01-01	8.9626
2007-01-01	9.1935
2008-01-01	9.6294
2009-01-01	9.6742
2010-01-01	9.0541
2011-01-01	10.3330
2012-01-01	10.5049
2013-01-01	10.5258
2014-01-01	11.7163
2015-01-01	11.4946
2016-01-01	11.7470
2017-01-01	10.7260