2008-03-31   -25.787
2008-04-29   -25.650
2009-11-06   -25.698
2010-02-11   -25.527
2010-04-01   -25.527
2010-05-31   -25.525
2010-12-08   -25.586
2012-01-16   -25.592
2012-04-20   -25.584
2013-01-03   -25.651
2013-03-13   -25.591
2013-06-16   -25.731
2015-01-14   -25.706
2015-11-30   -25.641
2017-02-10   -25.745