| Date | Value |
|---|---|
| Feb 16, 2022 19:47 | 450 ppm |
| Feb 11, 2022 03:29 | 450 ppm |
| Feb 9, 2022 20:12 | 460 ppm |
| Feb 4, 2022 02:37 | 480 ppm |
| Mar 31, 2018 20:18 | 475 ppm |
| Mar 17, 2018 21:21 | 455 ppm |
| Mar 9, 2018 17:53 | 460 ppm |
| Mar 3, 2018 21:19 | 470 ppm |
| Feb 25, 2018 12:46 | 455 ppm |
| Feb 19, 2018 00:21 | 475 ppm |
| Feb 18, 2018 02:05 | 480 ppm |