2008-08-21   3,716.870
2008-10-16   3,646.150
2008-12-08   3,330.170
2008-12-10   4,017.330
2009-01-24   3,764.440
2010-02-17   3,866.200
2010-04-01   3,850.170
2010-12-14   3,830.900
2011-11-18   3,674.870
2012-01-11   3,387.730
2012-01-12   3,460.110
2012-01-13   3,325.520