2008-12-20   6.720
2009-01-10   6.680
2009-07-11   5.860
2009-08-02   6.060
2009-09-13   6.510
2009-10-08   6.480
2009-11-07   6.040
2009-11-21   6.180
2009-12-06   6.340
2010-02-10   5.170
2010-09-30   6.360
2010-12-08   6.450
2011-11-16   4.780
2012-01-15   4.730
2012-08-26   5.370
2012-11-18   6.770
2013-01-03   6.810
2013-01-05   6.220