2009-01-11   -21.727
2009-10-09   -21.312
2009-11-07   -21.516
2009-11-21   -21.180
2009-12-06   -21.636
2010-02-11   -22.018
2010-09-30   -21.590
2010-12-08   -21.607
2012-01-15   -21.807
2012-08-26   -21.752
2012-09-21   -21.671
2013-01-03   -21.594