| Date | Value |
|---|---|
| Jan 23, 2021 15:49 | 1500 ppm |
| Sep 19, 2020 16:06 | 1480 ppm |
| Aug 9, 2020 22:23 | 1500 ppm |
| Jun 29, 2020 02:35 | 1500 ppm |
| Jun 1, 2020 00:27 | 1500 ppm |
| May 14, 2020 00:21 | 1500 ppm |
| May 3, 2020 23:24 | 1500 ppm |
| Apr 25, 2020 15:30 | 1500 ppm |
| Apr 18, 2020 15:28 | 1500 ppm |