Year	Number
2004-01-01	0.7991
2005-01-01	0.9077
2006-01-01	0.9620
2007-01-01	1.0163
2008-01-01	1.1016
2009-01-01	1.1637
2010-01-01	1.2258
2011-01-01	1.2335
2012-01-01	1.0163
2013-01-01	0.8456
2014-01-01	0.8379
2015-01-01	0.7836
2016-01-01	0.7525
2017-01-01	0.7525