| Date | Value |
|---|---|
| Mar 24, 2022 15:45 | 9 ppb |
| Oct 21, 2021 20:10 | 29 ppb |
| Jun 9, 2021 06:13 | 68 ppb |
| Jun 7, 2021 01:53 | 114 ppb |
| May 28, 2021 15:27 | 200 ppb |
| May 24, 2021 03:32 | 119 ppb |
| May 24, 2021 02:24 | 200 ppb |
| May 19, 2021 04:45 | 116 ppb |
| May 4, 2021 05:21 | 200 ppb |
| Apr 23, 2021 04:49 | 200 ppb |
| Oct 12, 2020 06:02 | 46 ppb |
| Jul 6, 2020 20:12 | 54 ppb |
| Jun 25, 2020 04:19 | 83 ppb |
| Jun 6, 2020 04:21 | 10 ppb |