Year	Number
2004-01-01	0.161048393
2005-01-01	0.154732770
2006-01-01	0.213941738
2007-01-01	0.183942528
2008-01-01	0.213941738
2009-01-01	0.228941344
2010-01-01	0.184731981
2011-01-01	0.193415963
2012-01-01	0.172100734
2013-01-01	0.164995658
2014-01-01	0.162627299