2008-03-31   -25.884
2008-04-29   -26.077
2009-11-06   -26.032
2010-02-11   -25.975
2010-04-01   -26.234
2010-05-31   -25.907
2010-12-08   -26.234
2012-01-16   -25.696
2012-04-20   -26.133
2013-03-13   -26.128
2013-06-16   -25.878
2015-01-14   -25.881
2015-11-30   -27.018
2017-02-10   -26.183