2008-12-20   6.444
2009-01-10   6.474
2009-08-02   6.484
2009-09-13   6.476
2009-10-08   6.430
2009-11-07   6.379
2009-11-21   6.449
2009-12-06   6.443
2010-09-30   6.422
2010-12-08   6.442
2011-11-16   6.433
2012-01-15   6.352
2012-08-26   6.391
2012-11-18   6.373
2013-01-03   6.345
2013-01-05   6.334