2009-01-25   -21.172
2009-11-06   -21.517
2009-11-20   -22.972
2010-03-31   -23.578
2010-12-14   -20.885
2012-01-13   -21.500
2013-11-28   -22.042
2014-08-22   -21.727
2014-12-31   -21.261
2015-12-01   -20.301
2017-02-13   -20.779