2009-10-08   1.580
2009-11-07   1.550
2009-11-21   1.390
2010-02-11   1.450
2010-09-30   1.620
2010-12-08   1.770
2012-01-16   1.360
2012-09-21   1.840
2013-09-20   1.950
2013-11-14   1.680