| Date | Value |
|---|---|
| Nov 8, 2017 19:02 | 1250 ppm |
| Sep 27, 2017 22:29 | 1350 ppm |
| Jul 28, 2017 01:02 | 1320 ppm |
| Jul 20, 2017 18:10 | 1750 ppm |
| Jun 25, 2017 20:11 | 1575 ppm |
| Jun 16, 2017 20:14 | 1575 ppm |
| May 18, 2017 20:41 | 1650 ppm |
| May 6, 2017 20:35 | 1575 ppm |
| Apr 29, 2017 20:34 | 1500 ppm |
| Apr 24, 2017 19:32 | 1650 ppm |
| Apr 15, 2017 20:29 | 1350 ppm |