| Group of Precursors | Region 1 and 3 | Region 2 |
| 1 | 0.00025 | 0.0124 |
| 2 | 0.00164 | 0.0305 |
| 3 | 0.00147 | 0.1110 |
| 4 | 0.00296 | 0.3010 |
| 5 | 0.00086 | 1.1400 |
| 6 | 0.00032 | 3.0100 |