| Date | Value |
|---|---|
| Jan 19, 2016 19:39 | 0.00 ppm |
| Feb 12, 2015 17:49 | 0.00 ppm |
| Sep 27, 2014 17:56 | 0.00 ppm |
| Jun 26, 2014 15:06 | 0.00 ppm |
| Mar 24, 2014 16:49 | 0.00 ppm |
| Jan 11, 2014 12:56 | 0.00 ppm |
| Dec 16, 2013 09:00 | 0.00 ppm |
| Nov 30, 2013 16:48 | 0.00 ppm |
| Nov 15, 2013 23:36 | 0.00 ppm |
| Oct 18, 2013 00:00 | 0.10 ppm |