2008-03-31   12.350
2008-04-29   11.690
2009-11-06   11.030
2010-02-11   10.780
2010-04-01   12.150
2010-05-31   11.830
2010-12-08   10.770
2012-01-16   8.820
2012-04-20   10.750
2013-01-03   9.550
2013-03-13   10.490
2013-06-16   11.660
2015-01-14   10.780
2015-11-30   9.930
2017-02-10   9.940