| Date | Value |
|---|---|
| Apr 8, 2015 00:12 | 0.00 ppm |
| Feb 28, 2015 13:44 | 0.00 ppm |
| Feb 10, 2015 00:51 | 0.00 ppm |
| Jan 17, 2015 16:17 | 0.00 ppm |
| Dec 10, 2014 00:51 | 0.00 ppm |
| Nov 18, 2014 01:46 | 0.00 ppm |
| Nov 12, 2014 01:46 | 0.00 ppm |
| Oct 31, 2014 01:45 | 0.00 ppm |
| Oct 30, 2014 01:38 | 0.50 ppm |
| Oct 28, 2014 01:08 | 1 ppm |
| Oct 26, 2014 01:01 | 0.00 ppm |