| Date | Value |
|---|---|
| May 8, 2015 00:52 | 3 ppm |
| Apr 7, 2015 00:16 | 0.00 ppm |
| Mar 26, 2015 23:41 | 5 ppm |
| Mar 16, 2015 00:15 | 10 ppm |
| Mar 11, 2015 23:52 | 20 ppm |
| Mar 3, 2015 18:50 | 0.00 ppm |
| Feb 19, 2015 18:14 | 0.00 ppm |
| Feb 16, 2015 00:09 | 0.00 ppm |
| Feb 9, 2015 01:31 | 0.00 ppm |
| Feb 4, 2015 20:11 | 0.00 ppm |
| Jan 28, 2015 23:48 | 0.00 ppm |
| Jan 25, 2015 01:17 | 0.00 ppm |
| Jan 20, 2015 00:40 | 5 ppm |
| Jan 14, 2015 00:00 | 0.00 ppm |