| Date | Value |
|---|---|
| Nov 30, 2020 22:32 | 1400 ppm |
| Nov 24, 2020 22:32 | 1470 ppm |
| May 14, 2020 14:08 | 1320 ppm |
| Apr 27, 2020 15:43 | 1370 ppm |
| Apr 21, 2020 15:20 | 1410 ppm |
| Apr 20, 2020 14:03 | 1320 ppm |
| Apr 18, 2020 17:28 | 1310 ppm |
| Apr 17, 2020 17:10 | 1340 ppm |
| Apr 16, 2020 18:40 | 1410 ppm |
| Apr 15, 2020 18:40 | 1420 ppm |
| Apr 14, 2020 18:40 | 1420 ppm |
| Apr 13, 2020 18:40 | 1470 ppm |