| Date | Value |
|---|---|
| Apr 4, 2019 17:30 | 0.00 ppm |
| Mar 17, 2019 11:29 | 0.00 ppm |
| Feb 26, 2019 10:12 | 0.00 ppm |
| Feb 6, 2019 11:25 | 0.00 ppm |
| Jan 14, 2019 11:35 | 0.00 ppm |
| Jan 4, 2019 11:33 | 0.00 ppm |
| Dec 12, 2018 11:32 | 0.00 ppm |
| Dec 4, 2018 11:30 | 0.00 ppm |
| Nov 28, 2018 11:27 | 0.00 ppm |
| Nov 19, 2018 06:25 | 0.00 ppm |