2009-01-11   -22.207
2009-10-09   -21.567
2009-11-07   -20.064
2009-11-21   -21.529
2009-12-06   -21.979
2010-02-11   -22.259
2010-09-30   -21.108
2010-12-08   -22.336
2012-01-15   -22.819
2012-08-26   -20.905
2012-09-21   -21.686
2013-01-03   -21.096