Year	Number
2004-01-01	0.514502540356293
2005-01-01	0.530580744742427
2006-01-01	0.546658949128561
2007-01-01	0.562737153514695
2008-01-01	0.562737153514695
2009-01-01	0.546799614023802
2010-01-01	0.546272493573265
2011-01-01	0.530546623794212
2012-01-01	0.530717272434867
2013-01-01	0.562791445570027
2014-01-01	0.514552178806882