| Date | Value |
|---|---|
| Sep 25, 2020 00:18 | 440 ppm |
| Sep 12, 2020 21:06 | 428 ppm |
| Sep 4, 2020 17:19 | 440 ppm |
| Aug 22, 2020 17:59 | 440 ppm |
| Aug 15, 2020 19:45 | 404 ppm |
| Aug 14, 2020 01:39 | 428 ppm |
| Aug 8, 2020 19:59 | 440 ppm |
| Aug 3, 2020 03:18 | 428 ppm |
| Jul 29, 2020 20:11 | 380 ppm |
| Jul 27, 2020 17:24 | 368 ppm |
| Jul 18, 2020 16:21 | 416 ppm |