2009-01-10 7.920 2009-10-09 6.120 2009-11-07 7.410 2009-12-06 6.280 2010-02-11 6.650 2010-09-30 7.610 2010-12-08 7.890 2011-08-05 6.570 2012-01-15 6.610 2013-01-03 7.070 2013-01-05 8.610 2014-04-21 8.620 2014-08-22 7.040 2015-01-02 7.670 2016-09-25 7.200 2017-02-13 6.340