Year	Number
2004-01-01	9.8498
2005-01-01	9.5360
2006-01-01	9.2554
2007-01-01	9.2171
2008-01-01	8.9293
2009-01-01	8.9839
2010-01-01	8.9091
2011-01-01	8.6286
2012-01-01	7.9379