2008-08-21   6.680
2008-10-16   6.220
2008-12-09   6.200
2008-12-10   6.310
2009-01-25   6.310
2009-11-06   6.090
2009-11-20   6.350
2010-03-31   6.310
2010-12-14   6.270
2011-11-17   5.960
2011-12-01   6.040
2012-01-12   5.450
2012-01-13   5.700
2012-04-18   5.300
2012-11-20   5.790
2013-01-29   5.840
2013-03-14   5.910
2013-11-14   5.870
2013-11-28   5.690
2014-03-17   6.530
2014-12-30   5.000
2014-12-31   5.130
2015-01-11   4.920
2015-12-01   6.220
2017-02-10   4.610