Year	Number
2004-01-01	0.6431
2005-01-01	0.6074
2006-01-01	0.6074
2007-01-01	0.6074
2008-01-01	0.5716
2009-01-01	0.6074
2010-01-01	0.3215
2011-01-01	0.3215
2012-01-01	0.3573
2013-01-01	0.3573
2014-01-01	0.3930
2015-01-01	0.3930
2016-01-01	0.3930