2009-01-25   1.630
2009-11-06   1.390
2009-11-20   1.560
2010-03-31   1.280
2010-12-14   1.620
2012-01-13   1.500
2013-11-28   1.400
2014-08-22   1.550
2014-12-31   1.490
2015-12-01   1.310
2017-02-13   1.110