| Date | Value |
|---|---|
| Jul 22, 2021 22:59 | 1350 ppm |
| Jul 16, 2021 13:36 | 1260 ppm |
| Jul 14, 2021 14:41 | 1260 ppm |
| Jul 12, 2021 16:08 | 1260 ppm |
| Jul 7, 2021 13:50 | 1280 ppm |
| Jul 6, 2021 14:49 | 1300 ppm |
| Jul 3, 2021 02:16 | 1170 ppm |
| Jul 1, 2021 00:25 | 1280 ppm |
| Jun 2, 2021 03:04 | 1290 ppm |