| Date | Value |
|---|---|
| Jun 12, 2015 21:10 | 50 ppm |
| Apr 24, 2015 21:11 | 15 ppm |
| Apr 18, 2015 20:05 | 15 ppm |
| Mar 29, 2015 02:46 | 25 ppm |
| Mar 21, 2015 01:28 | 30 ppm |
| Jan 9, 2015 22:40 | 30 ppm |
| Dec 12, 2014 19:08 | 35 ppm |
| Dec 6, 2014 23:03 | 40 ppm |
| Nov 29, 2014 16:45 | 30 ppm |
| Nov 12, 2014 18:00 | 30 ppm |