2009-01-25   -21.800
2009-11-06   -22.010
2009-11-20   -22.011
2010-03-31   -21.917
2010-12-14   -22.074
2012-01-13   -21.939
2013-11-28   -21.885
2014-08-22   -21.928
2014-12-31   -21.944
2015-12-01   -21.953
2017-02-13   -21.913