| Date | Value |
|---|---|
| May 26, 2013 23:20 | 0.00 ppm |
| May 10, 2013 11:29 | 0.00 ppm |
| May 5, 2013 20:17 | 0.00 ppm |
| Apr 27, 2013 11:32 | 0.00 ppm |
| Apr 22, 2013 11:18 | 0.00 ppm |
| Apr 12, 2013 20:27 | 0.00 ppm |
| Apr 5, 2013 09:16 | 0.00 ppm |
| Mar 29, 2013 11:24 | 0.00 ppm |
| Mar 22, 2013 08:30 | 0.00 ppm |
| Mar 19, 2013 09:27 | 0.00 ppm |
| Mar 17, 2013 23:38 | 0.00 ppm |
| Mar 16, 2013 11:13 | 0.00 ppm |