| Date | Value |
|---|---|
| Mar 24, 2022 15:46 | 0.03 ppm |
| Oct 21, 2021 20:10 | 0.09 ppm |
| Jun 9, 2021 06:13 | 0.21 ppm |
| Jun 7, 2021 01:57 | 0.35 ppm |
| May 19, 2021 04:48 | 0.36 ppm |
| Apr 23, 2021 04:49 | 0.61 ppm |
| Oct 12, 2020 06:05 | 0.14 ppm |
| Jul 6, 2020 20:13 | 0.17 ppm |
| Jun 25, 2020 04:25 | 0.25 ppm |
| Jun 6, 2020 04:26 | 0.03 ppm |