| Date | Value |
|---|---|
| Feb 21, 2021 17:56 | 0.01 ppm |
| Jan 17, 2021 17:50 | 0.01 ppm |
| Jan 3, 2021 17:54 | 0.00 ppm |
| Dec 13, 2020 18:04 | 0.00 ppm |
| Nov 29, 2020 17:59 | 0.00 ppm |
| Nov 22, 2020 17:26 | 0.00 ppm |
| Nov 15, 2020 18:55 | 0.00 ppm |
| Nov 8, 2020 18:26 | 0.00 ppm |
| Nov 1, 2020 17:26 | 0.02 ppm |
| Oct 18, 2020 16:49 | 0.01 ppm |
| Oct 11, 2020 17:14 | 0.00 ppm |
| Oct 5, 2020 18:01 | 0.00 ppm |
| Sep 30, 2020 10:00 | 0.00 ppm |