| Date | Value |
|---|---|
| May 11, 2024 23:57 | 450 ppm |
| Mar 2, 2024 15:51 | 450 ppm |
| Dec 26, 2023 03:32 | 440 ppm |
| Dec 9, 2023 10:51 | 470 ppm |
| Oct 19, 2022 14:13 | 460 ppm |
| Mar 18, 2022 13:53 | 480 ppm |
| Mar 6, 2022 01:26 | 485 ppm |
| Feb 26, 2022 16:35 | 450 ppm |
| Feb 5, 2022 15:54 | 480 ppm |
| Jan 15, 2022 07:46 | 450 ppm |