2008-04-29   3.930
2008-06-13   3.860
2009-11-07   3.410
2010-04-01   3.880
2010-06-01   3.410
2010-09-30   4.170
2011-03-26   3.590
2011-10-09   3.360
2012-09-21   4.290
2014-03-20   3.220
2014-05-28   4.420
2014-07-22   4.080
2014-09-22   4.350
2015-06-25   3.950
2015-07-25   3.850
2016-07-23   3.790