2009-01-11   -21.790
2009-10-09   -21.478
2009-11-07   -21.605
2009-11-21   -21.547
2009-12-06   -21.710
2010-02-11   -21.794
2010-09-30   -21.634
2010-12-08   -21.578
2012-01-15   -21.756
2012-08-26   -21.771
2012-09-21   -21.684
2013-01-03   -21.585