2009-01-10   3.630
2009-10-09   3.800
2009-11-07   3.700
2009-12-06   3.760
2010-02-11   3.380
2010-09-30   3.770
2010-12-08   3.880
2011-08-05   3.570
2012-01-15   3.230
2013-01-03   3.070
2013-01-05   3.190
2014-04-21   3.250
2014-08-22   3.740
2015-01-02   3.900
2016-09-25   3.240
2017-02-13   3.390