2008-08-21   0.890
2008-10-16   0.790
2008-12-10   0.810
2009-01-25   0.770
2009-11-06   0.810
2009-11-20   0.800
2010-12-14   0.790
2011-05-31   0.900
2014-08-22   0.640
2014-12-30   0.830