| Date | Value |
|---|---|
| Jul 25, 2016 17:40 | 1350 ppm |
| Apr 26, 2016 21:45 | 1500 ppm |
| Apr 18, 2016 23:52 | 1400 ppm |
| Apr 11, 2016 23:52 | 1300 ppm |
| Apr 4, 2016 23:52 | 1300 ppm |
| Mar 28, 2016 23:52 | 1300 ppm |
| Mar 21, 2016 23:52 | 1300 ppm |
| Mar 14, 2016 23:52 | 1300 ppm |
| Mar 7, 2016 23:52 | 1300 ppm |
| Feb 29, 2016 23:52 | 1300 ppm |
| Feb 22, 2016 23:52 | 1300 ppm |
| Feb 15, 2016 23:52 | 1300 ppm |
| Feb 8, 2016 23:52 | 1300 ppm |