2008-08-21   4,012.950
2008-10-16   3,752.510
2008-12-08   3,678.470
2008-12-10   4,146.510
2009-01-24   3,980.600
2010-02-17   4,205.120
2010-04-01   4,153.970
2010-12-14   3,819.560
2011-11-18   3,757.510
2012-01-11   3,580.040
2012-01-12   3,784.370
2012-01-13   3,412.140