2008-04-29   8.480
2008-06-13   7.960
2009-11-06   7.450
2010-04-01   8.210
2010-06-01   7.790
2010-09-30   8.220
2011-03-26   8.460
2011-10-09   8.250
2012-09-21   8.070
2014-03-20   7.540
2014-05-28   8.640
2014-07-22   8.210
2014-09-22   8.500
2015-06-25   8.360
2015-07-25   8.330
2015-08-24   8.290
2016-07-23   8.150