2008-12-20   7.700
2009-01-10   7.470
2009-08-02   7.310
2009-09-13   7.950
2009-10-08   7.820
2009-11-07   7.590
2009-11-21   7.440
2009-12-06   6.650
2010-02-10   7.300
2010-09-30   8.340
2010-12-08   8.080
2011-11-16   5.860
2012-01-15   6.300
2012-08-26   6.950
2012-11-18   6.940
2013-01-03   8.020
2013-01-05   7.280