2009-10-08   4.150
2009-11-07   4.010
2009-11-21   4.320
2010-02-11   5.100
2010-09-30   5.490
2010-12-08   5.440
2012-01-16   4.770
2012-09-21   4.400
2013-09-20   3.980
2013-11-14   3.900