Year	Number
2004-01-01	0.9881
2005-01-01	0.9552
2006-01-01	0.7905
2007-01-01	0.8564
2008-01-01	0.9223
2009-01-01	0.9552
2010-01-01	1.4163
2011-01-01	1.4493
2012-01-01	1.4493
2013-01-01	1.5810
2014-01-01	1.5810