| Date | Value |
|---|---|
| Sep 27, 2021 00:51 | 155 ppm |
| Aug 22, 2021 17:12 | 147 ppm |
| Aug 15, 2021 13:31 | 181 ppm |
| Aug 3, 2021 00:14 | 163 ppm |
| Jul 26, 2021 14:20 | 144 ppm |
| Jul 19, 2021 12:48 | 142 ppm |
| Jul 12, 2021 14:08 | 140 ppm |
| Jul 6, 2021 01:15 | 126 ppm |
| Jun 27, 2021 17:40 | 128 ppm |
| Jun 23, 2021 10:12 | 163 ppm |
| Jun 21, 2021 00:29 | 134 ppm |
| Jun 17, 2021 20:18 | 176 ppm |
| Jun 12, 2021 20:03 | 208 ppm |