2008-03-31   -25.972
2008-04-29   -26.660
2009-11-06   -25.785
2010-02-11   -25.819
2010-04-01   -26.399
2010-05-31   -25.824
2010-12-08   -26.176
2012-01-16   -26.071
2012-04-20   -26.017
2013-01-03   -26.000
2013-03-13   -25.978
2013-06-16   -25.906
2015-01-14   -25.844
2015-11-30   -25.978
2017-02-10   -26.229