| Date | Value |
|---|---|
| Oct 30, 2018 07:19 | 0.00 ppm |
| Sep 21, 2018 13:47 | 0.00 ppm |
| Feb 12, 2017 03:09 | 0.00 ppm |
| Nov 5, 2016 06:33 | 0.00 ppm |
| May 15, 2016 02:21 | 0.00 ppm |
| Apr 8, 2016 09:26 | 2 ppm |
| Mar 19, 2016 04:20 | 0.00 ppm |
| Mar 12, 2016 03:13 | 0.00 ppm |
| Dec 19, 2015 07:27 | 0.00 ppm |
| Nov 26, 2015 06:06 | 0.00 ppm |
| Nov 13, 2015 10:57 | 0.00 ppm |
| Oct 29, 2015 16:24 | 0.00 ppm |
| Oct 23, 2015 09:24 | 0.00 ppm |