2009-10-08   3.720
2009-11-07   3.760
2009-11-21   4.540
2010-02-11   4.290
2010-09-30   4.850
2010-12-08   3.880
2012-01-16   4.130
2012-09-21   4.000
2013-09-20   3.920
2013-11-14   4.420