Year	Number
2004-01-01	0.5835
2005-01-01	0.5664
2006-01-01	0.5505
2007-01-01	1.0703
2008-01-01	1.0405
2009-01-01	1.5175
2010-01-01	1.9675
2011-01-01	6.9421
2012-01-01	5.5917
2013-01-01	5.8962
2014-01-01	5.0771
2015-01-01	4.9425
2016-01-01	5.0257