2009-11-06   3.440
2009-11-20   3.870
2010-03-31   3.550
2010-12-14   3.830
2012-01-13   3.390
2013-11-28   3.400
2014-08-22   3.330
2014-12-31   3.470
2015-12-01   3.270
2017-02-13   3.300