| Date | Value |
|---|---|
| Jan 16, 2014 13:29 | 54 ppm |
| Jan 14, 2014 18:01 | 54 ppm |
| Jan 13, 2014 11:40 | 54 ppm |
| Jan 12, 2014 13:47 | 54 ppm |
| Jan 11, 2014 13:00 | 54 ppm |
| Jan 10, 2014 13:00 | 54 ppm |
| Jan 9, 2014 11:16 | 54 ppm |
| Jan 8, 2014 16:32 | 54 ppm |
| Jan 7, 2014 12:33 | 54 ppm |
| Jan 6, 2014 10:53 | 54 ppm |
| Jan 5, 2014 12:34 | 35.8 ppm |
| Jan 4, 2014 19:17 | 35.8 ppm |