2008-12-10   3.800
2009-01-25   3.910
2009-11-06   3.870
2009-11-20   3.800
2010-03-31   3.970
2010-12-14   3.770
2012-01-11   3.690
2012-11-20   3.750
2013-02-17   3.960
2013-03-06   3.630
2013-03-14   3.820
2013-11-28   3.710
2014-12-31   3.750
2015-01-11   3.940
2015-12-01   3.840
2016-02-10   3.880
2017-02-13   3.740