| Date | Value |
|---|---|
| Apr 8, 2015 00:13 | 0.00 ppm |
| Feb 28, 2015 13:45 | 0.00 ppm |
| Feb 10, 2015 00:52 | 0.00 ppm |
| Jan 17, 2015 16:17 | 0.00 ppm |
| Dec 10, 2014 00:51 | 0.00 ppm |
| Nov 18, 2014 01:47 | 0.00 ppm |
| Nov 12, 2014 01:47 | 0.00 ppm |
| Oct 31, 2014 01:47 | 0.00 ppm |
| Oct 30, 2014 01:36 | 0.00 ppm |
| Oct 28, 2014 01:06 | 5 ppm |
| Oct 26, 2014 01:02 | 0.00 ppm |