| Date | Value |
|---|---|
| Oct 7, 2020 05:46 | 1500 ppm |
| Sep 19, 2020 22:42 | 1350 ppm |
| Sep 12, 2020 01:58 | 1280 ppm |
| Sep 8, 2020 22:31 | 1410 ppm |
| Sep 2, 2020 02:49 | 1500 ppm |
| Aug 26, 2020 23:40 | 1410 ppm |
| Aug 22, 2020 23:14 | 1370 ppm |
| Aug 18, 2020 23:15 | 1500 ppm |
| Aug 14, 2020 22:57 | 1410 ppm |
| Aug 6, 2020 01:17 | 1380 ppm |