2009-01-10   3.420
2009-10-09   3.130
2009-11-07   3.440
2009-12-06   3.410
2010-02-11   3.400
2010-03-23   3.320
2010-09-29   2.960
2010-12-08   2.890
2011-08-05   3.030
2012-01-15   3.510
2013-01-03   3.200
2013-01-05   3.500
2013-11-29   3.480
2014-04-21   3.600
2014-08-22   3.160
2015-01-02   2.760
2016-09-25   3.330
2017-02-13   2.970