| Hidden neuron | AAD | Best fitness | R2 | RMSEP |
| 5 | 0.0204 | 2.35E−03 | 0.9652 | 0.0563 |
| 6 | 0.0136 | 1.45E−03 | 0.9725 | 0.0405 |
| 7 | 0.0112 | 6.74E−04 | 0.9756 | 0.0357 |
| 8 | 0.0089 | 5.53E−05 | 0.9811 | 0.0288 |
| 9 | 0.0061 | 1.03E−06 | 0.9903 | 0.0163 |
| 10 | 0.0082 | 8.21E−05 | 0.9812 | 0.0213 |
| 11 | 0.0099 | 8.41E−05 | 0.9789 | 0.0326 |
| 12 | 0.0126 | 8.44E−05 | 0.9775 | 0.0382 |
| 13 | 0.0168 | 1.29E−04 | 0.9757 | 0.0408 |
| 14 | 0.0183 | 1.38E−05 | 0.9689 | 0.0479 |
| 15 | 0.0252 | 1.47E−04 | 0.9670 | 0.0552 |