| Date | Value |
|---|---|
| Aug 13, 2017 11:27 | 0.00 ppm |
| Aug 7, 2017 10:33 | 0.00 ppm |
| Jul 8, 2017 14:30 | 0.00 ppm |
| Jun 25, 2017 12:42 | 0.00 ppm |
| Jun 11, 2017 13:34 | 0.00 ppm |
| May 27, 2017 12:03 | 0.00 ppm |
| May 20, 2017 11:52 | 0.00 ppm |
| May 13, 2017 11:27 | 0.00 ppm |
| May 12, 2017 14:07 | 0.00 ppm |
| May 7, 2017 11:32 | 0.00 ppm |
| May 6, 2017 09:30 | 0.00 ppm |
| May 1, 2017 14:53 | 0.00 ppm |